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Finding the Fourth Proportional to 572.31, 790.54 and 462.20

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Solution

The fourth proportional to 572.31, 790.54 and 462.20 is: 638.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.31 : 790.54 = 462.20 : x
  2. Step 2: Convert to fraction form
    572.31/790.54 = 462.20/x
  3. Step 3: Cross multiply
    572.31x = 790.54 × 462.20
  4. Step 4: Simplify right side
    572.31x = 365,387.59
  5. Step 5: Solve for x
    x = 365,387.59/572.31
  6. Step 6: Final answer
    x = 638.44

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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.