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Finding the Fourth Proportional to 1,330,684,679.80, 1,996,027,019.70 and 986,310,911.80

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Solution

The fourth proportional to 1,330,684,679.80, 1,996,027,019.70 and 986,310,911.80 is: 1,479,466,367.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330,684,679.80 : 1,996,027,019.70 = 986,310,911.80 : x
  2. Step 2: Convert to fraction form
    1,330,684,679.80/1,996,027,019.70 = 986,310,911.80/x
  3. Step 3: Cross multiply
    1,330,684,679.80x = 1,996,027,019.70 × 986,310,911.80
  4. Step 4: Simplify right side
    1,330,684,679.80x = 1,968,703,229,777,743,616
  5. Step 5: Solve for x
    x = 1,968,703,229,777,743,616/1,330,684,679.80
  6. Step 6: Final answer
    x = 1,479,466,367.70

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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.