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Finding the Fourth Proportional to 625.28, 862.49 and 415.45

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Solution

The fourth proportional to 625.28, 862.49 and 415.45 is: 573.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.28 : 862.49 = 415.45 : x
  2. Step 2: Convert to fraction form
    625.28/862.49 = 415.45/x
  3. Step 3: Cross multiply
    625.28x = 862.49 × 415.45
  4. Step 4: Simplify right side
    625.28x = 358,321.47
  5. Step 5: Solve for x
    x = 358,321.47/625.28
  6. Step 6: Final answer
    x = 573.06

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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.