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Finding the Fourth Proportional to 542,281.20, 812,644.20 and 399,008.40

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Solution

The fourth proportional to 542,281.20, 812,644.20 and 399,008.40 is: 597,940.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,281.20 : 812,644.20 = 399,008.40 : x
  2. Step 2: Convert to fraction form
    542,281.20/812,644.20 = 399,008.40/x
  3. Step 3: Cross multiply
    542,281.20x = 812,644.20 × 399,008.40
  4. Step 4: Simplify right side
    542,281.20x = 324,251,862,011.28
  5. Step 5: Solve for x
    x = 324,251,862,011.28/542,281.20
  6. Step 6: Final answer
    x = 597,940.44

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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.