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Finding the Fourth Proportional to 542.52, 748.80 and 455.04

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Solution

The fourth proportional to 542.52, 748.80 and 455.04 is: 628.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.52 : 748.80 = 455.04 : x
  2. Step 2: Convert to fraction form
    542.52/748.80 = 455.04/x
  3. Step 3: Cross multiply
    542.52x = 748.80 × 455.04
  4. Step 4: Simplify right side
    542.52x = 340,733.95
  5. Step 5: Solve for x
    x = 340,733.95/542.52
  6. Step 6: Final answer
    x = 628.06

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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.