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Finding the Fourth Proportional to 638.10, 956.95 and 248.08

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Solution

The fourth proportional to 638.10, 956.95 and 248.08 is: 372.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.10 : 956.95 = 248.08 : x
  2. Step 2: Convert to fraction form
    638.10/956.95 = 248.08/x
  3. Step 3: Cross multiply
    638.10x = 956.95 × 248.08
  4. Step 4: Simplify right side
    638.10x = 237,397.76
  5. Step 5: Solve for x
    x = 237,397.76/638.10
  6. Step 6: Final answer
    x = 372.04

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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.