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Finding the Fourth Proportional to 638.30, 881.72 and 514.44

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Solution

The fourth proportional to 638.30, 881.72 and 514.44 is: 710.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.30 : 881.72 = 514.44 : x
  2. Step 2: Convert to fraction form
    638.30/881.72 = 514.44/x
  3. Step 3: Cross multiply
    638.30x = 881.72 × 514.44
  4. Step 4: Simplify right side
    638.30x = 453,592.04
  5. Step 5: Solve for x
    x = 453,592.04/638.30
  6. Step 6: Final answer
    x = 710.63

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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.