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Finding the Fourth Proportional to 981,115.60, 1,471,892.10 and 768,539.20

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Solution

The fourth proportional to 981,115.60, 1,471,892.10 and 768,539.20 is: 1,152,980.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,115.60 : 1,471,892.10 = 768,539.20 : x
  2. Step 2: Convert to fraction form
    981,115.60/1,471,892.10 = 768,539.20/x
  3. Step 3: Cross multiply
    981,115.60x = 1,471,892.10 × 768,539.20
  4. Step 4: Simplify right side
    981,115.60x = 1,131,206,777,020.32
  5. Step 5: Solve for x
    x = 1,131,206,777,020.32/981,115.60
  6. Step 6: Final answer
    x = 1,152,980.11

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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.