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Finding the Fourth Proportional to 625.60, 862.90 and 514.88

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Solution

The fourth proportional to 625.60, 862.90 and 514.88 is: 710.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.60 : 862.90 = 514.88 : x
  2. Step 2: Convert to fraction form
    625.60/862.90 = 514.88/x
  3. Step 3: Cross multiply
    625.60x = 862.90 × 514.88
  4. Step 4: Simplify right side
    625.60x = 444,289.95
  5. Step 5: Solve for x
    x = 444,289.95/625.60
  6. Step 6: Final answer
    x = 710.18

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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.