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Finding the Fourth Proportional to 542.66, 813.98 and 157.91

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Solution

The fourth proportional to 542.66, 813.98 and 157.91 is: 236.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.66 : 813.98 = 157.91 : x
  2. Step 2: Convert to fraction form
    542.66/813.98 = 157.91/x
  3. Step 3: Cross multiply
    542.66x = 813.98 × 157.91
  4. Step 4: Simplify right side
    542.66x = 128,535.58
  5. Step 5: Solve for x
    x = 128,535.58/542.66
  6. Step 6: Final answer
    x = 236.86

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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.