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Finding the Fourth Proportional to 317.38, 476.12 and 100.91

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Solution

The fourth proportional to 317.38, 476.12 and 100.91 is: 151.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.38 : 476.12 = 100.91 : x
  2. Step 2: Convert to fraction form
    317.38/476.12 = 100.91/x
  3. Step 3: Cross multiply
    317.38x = 476.12 × 100.91
  4. Step 4: Simplify right side
    317.38x = 48,045.27
  5. Step 5: Solve for x
    x = 48,045.27/317.38
  6. Step 6: Final answer
    x = 151.38

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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.