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Finding the Fourth Proportional to 542,407.20, 813,625.20 and 168,439.20

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Solution

The fourth proportional to 542,407.20, 813,625.20 and 168,439.20 is: 252,663.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,407.20 : 813,625.20 = 168,439.20 : x
  2. Step 2: Convert to fraction form
    542,407.20/813,625.20 = 168,439.20/x
  3. Step 3: Cross multiply
    542,407.20x = 813,625.20 × 168,439.20
  4. Step 4: Simplify right side
    542,407.20x = 137,046,377,787.84
  5. Step 5: Solve for x
    x = 137,046,377,787.84/542,407.20
  6. Step 6: Final answer
    x = 252,663.27

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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.