Home / 1,327,105,881.20-1,990,658,821.80-406,974,911.60

Finding the Fourth Proportional to 1,327,105,881.20, 1,990,658,821.80 and 406,974,911.60

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Solution

The fourth proportional to 1,327,105,881.20, 1,990,658,821.80 and 406,974,911.60 is: 610,462,367.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327,105,881.20 : 1,990,658,821.80 = 406,974,911.60 : x
  2. Step 2: Convert to fraction form
    1,327,105,881.20/1,990,658,821.80 = 406,974,911.60/x
  3. Step 3: Cross multiply
    1,327,105,881.20x = 1,990,658,821.80 × 406,974,911.60
  4. Step 4: Simplify right side
    1,327,105,881.20x = 810,148,198,027,815,168
  5. Step 5: Solve for x
    x = 810,148,198,027,815,168/1,327,105,881.20
  6. Step 6: Final answer
    x = 610,462,367.40

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Half scale
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Double scale
Find fourth proportional to 1,327,105,882.20, 1,990,658,823.30 and 406,974,912.60
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.