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Finding the Fourth Proportional to 402,129.43, 554,948.42 and 218,375.87

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Solution

The fourth proportional to 402,129.43, 554,948.42 and 218,375.87 is: 301,364.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,129.43 : 554,948.42 = 218,375.87 : x
  2. Step 2: Convert to fraction form
    402,129.43/554,948.42 = 218,375.87/x
  3. Step 3: Cross multiply
    402,129.43x = 554,948.42 × 218,375.87
  4. Step 4: Simplify right side
    402,129.43x = 121,187,340,156.00
  5. Step 5: Solve for x
    x = 121,187,340,156.00/402,129.43
  6. Step 6: Final answer
    x = 301,364.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.