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Finding the Fourth Proportional to 392,902.49, 542,338.18 and 255,269.72

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Solution

The fourth proportional to 392,902.49, 542,338.18 and 255,269.72 is: 352,358.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,902.49 : 542,338.18 = 255,269.72 : x
  2. Step 2: Convert to fraction form
    392,902.49/542,338.18 = 255,269.72/x
  3. Step 3: Cross multiply
    392,902.49x = 542,338.18 × 255,269.72
  4. Step 4: Simplify right side
    392,902.49x = 138,442,512,004.04
  5. Step 5: Solve for x
    x = 138,442,512,004.04/392,902.49
  6. Step 6: Final answer
    x = 352,358.45

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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.