Home / 1,327,105,309.20-1,990,657,963.80-406,974,339.60

Finding the Fourth Proportional to 1,327,105,309.20, 1,990,657,963.80 and 406,974,339.60

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Solution

The fourth proportional to 1,327,105,309.20, 1,990,657,963.80 and 406,974,339.60 is: 610,461,509.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327,105,309.20 : 1,990,657,963.80 = 406,974,339.60 : x
  2. Step 2: Convert to fraction form
    1,327,105,309.20/1,990,657,963.80 = 406,974,339.60/x
  3. Step 3: Cross multiply
    1,327,105,309.20x = 1,990,657,963.80 × 406,974,339.60
  4. Step 4: Simplify right side
    1,327,105,309.20x = 810,146,710,186,985,728
  5. Step 5: Solve for x
    x = 810,146,710,186,985,728/1,327,105,309.20
  6. Step 6: Final answer
    x = 610,461,509.40

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Half scale
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Double scale
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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.