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Finding the Fourth Proportional to 638.22, 880.74 and 372.84

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Solution

The fourth proportional to 638.22, 880.74 and 372.84 is: 514.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.22 : 880.74 = 372.84 : x
  2. Step 2: Convert to fraction form
    638.22/880.74 = 372.84/x
  3. Step 3: Cross multiply
    638.22x = 880.74 × 372.84
  4. Step 4: Simplify right side
    638.22x = 328,375.10
  5. Step 5: Solve for x
    x = 328,375.10/638.22
  6. Step 6: Final answer
    x = 514.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.