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Finding the Fourth Proportional to 543.61, 815.42 and 132.75

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Solution

The fourth proportional to 543.61, 815.42 and 132.75 is: 199.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.61 : 815.42 = 132.75 : x
  2. Step 2: Convert to fraction form
    543.61/815.42 = 132.75/x
  3. Step 3: Cross multiply
    543.61x = 815.42 × 132.75
  4. Step 4: Simplify right side
    543.61x = 108,245.30
  5. Step 5: Solve for x
    x = 108,245.30/543.61
  6. Step 6: Final answer
    x = 199.12

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Double scale
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Similar ratio
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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.