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Finding the Fourth Proportional to 542.75, 814.28 and 265.12

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Solution

The fourth proportional to 542.75, 814.28 and 265.12 is: 397.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.75 : 814.28 = 265.12 : x
  2. Step 2: Convert to fraction form
    542.75/814.28 = 265.12/x
  3. Step 3: Cross multiply
    542.75x = 814.28 × 265.12
  4. Step 4: Simplify right side
    542.75x = 215,878.55
  5. Step 5: Solve for x
    x = 215,878.55/542.75
  6. Step 6: Final answer
    x = 397.75

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Double scale
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Similar ratio
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1.5x scale

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.