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Finding the Fourth Proportional to 981,361,515.60, 1,470,791,892.60 and 521,519,979.60

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Solution

The fourth proportional to 981,361,515.60, 1,470,791,892.60 and 521,519,979.60 is: 781,615,485.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,361,515.60 : 1,470,791,892.60 = 521,519,979.60 : x
  2. Step 2: Convert to fraction form
    981,361,515.60/1,470,791,892.60 = 521,519,979.60/x
  3. Step 3: Cross multiply
    981,361,515.60x = 1,470,791,892.60 × 521,519,979.60
  4. Step 4: Simplify right side
    981,361,515.60x = 767,047,357,824,597,376
  5. Step 5: Solve for x
    x = 767,047,357,824,597,376/981,361,515.60
  6. Step 6: Final answer
    x = 781,615,485.86

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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.