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Finding the Fourth Proportional to 538.30, 742.92 and 317.25

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Solution

The fourth proportional to 538.30, 742.92 and 317.25 is: 437.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.30 : 742.92 = 317.25 : x
  2. Step 2: Convert to fraction form
    538.30/742.92 = 317.25/x
  3. Step 3: Cross multiply
    538.30x = 742.92 × 317.25
  4. Step 4: Simplify right side
    538.30x = 235,691.96
  5. Step 5: Solve for x
    x = 235,691.96/538.30
  6. Step 6: Final answer
    x = 437.84

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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.