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Finding the Fourth Proportional to 543.40, 814.92 and 158.56

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Solution

The fourth proportional to 543.40, 814.92 and 158.56 is: 237.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.40 : 814.92 = 158.56 : x
  2. Step 2: Convert to fraction form
    543.40/814.92 = 158.56/x
  3. Step 3: Cross multiply
    543.40x = 814.92 × 158.56
  4. Step 4: Simplify right side
    543.40x = 129,213.72
  5. Step 5: Solve for x
    x = 129,213.72/543.40
  6. Step 6: Final answer
    x = 237.79

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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.