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Finding the Fourth Proportional to 417.52, 574.80 and 393.76

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Solution

The fourth proportional to 417.52, 574.80 and 393.76 is: 542.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.52 : 574.80 = 393.76 : x
  2. Step 2: Convert to fraction form
    417.52/574.80 = 393.76/x
  3. Step 3: Cross multiply
    417.52x = 574.80 × 393.76
  4. Step 4: Simplify right side
    417.52x = 226,333.25
  5. Step 5: Solve for x
    x = 226,333.25/417.52
  6. Step 6: Final answer
    x = 542.09

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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.