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Finding the Fourth Proportional to 486,539.79, 729,807.90 and 131,553.78

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Solution

The fourth proportional to 486,539.79, 729,807.90 and 131,553.78 is: 197,330.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,539.79 : 729,807.90 = 131,553.78 : x
  2. Step 2: Convert to fraction form
    486,539.79/729,807.90 = 131,553.78/x
  3. Step 3: Cross multiply
    486,539.79x = 729,807.90 × 131,553.78
  4. Step 4: Simplify right side
    486,539.79x = 96,008,987,918.86
  5. Step 5: Solve for x
    x = 96,008,987,918.86/486,539.79
  6. Step 6: Final answer
    x = 197,330.19

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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.