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Finding the Fourth Proportional to 387,159.30, 579,572.55 and 345,168.90

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Solution

The fourth proportional to 387,159.30, 579,572.55 and 345,168.90 is: 516,713.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,159.30 : 579,572.55 = 345,168.90 : x
  2. Step 2: Convert to fraction form
    387,159.30/579,572.55 = 345,168.90/x
  3. Step 3: Cross multiply
    387,159.30x = 579,572.55 × 345,168.90
  4. Step 4: Simplify right side
    387,159.30x = 200,050,419,553.70
  5. Step 5: Solve for x
    x = 200,050,419,553.70/387,159.30
  6. Step 6: Final answer
    x = 516,713.46

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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.