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Finding the Fourth Proportional to 638.03, 956.49 and 291.24

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Solution

The fourth proportional to 638.03, 956.49 and 291.24 is: 436.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.03 : 956.49 = 291.24 : x
  2. Step 2: Convert to fraction form
    638.03/956.49 = 291.24/x
  3. Step 3: Cross multiply
    638.03x = 956.49 × 291.24
  4. Step 4: Simplify right side
    638.03x = 278,568.15
  5. Step 5: Solve for x
    x = 278,568.15/638.03
  6. Step 6: Final answer
    x = 436.61

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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.