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Finding the Fourth Proportional to 317.91, 477.10 and 187.83

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Solution

The fourth proportional to 317.91, 477.10 and 187.83 is: 281.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.91 : 477.10 = 187.83 : x
  2. Step 2: Convert to fraction form
    317.91/477.10 = 187.83/x
  3. Step 3: Cross multiply
    317.91x = 477.10 × 187.83
  4. Step 4: Simplify right side
    317.91x = 89,612.75
  5. Step 5: Solve for x
    x = 89,612.75/317.91
  6. Step 6: Final answer
    x = 281.88

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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.