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Finding the Fourth Proportional to 625.25, 862.55 and 404.27

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Solution

The fourth proportional to 625.25, 862.55 and 404.27 is: 557.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.25 : 862.55 = 404.27 : x
  2. Step 2: Convert to fraction form
    625.25/862.55 = 404.27/x
  3. Step 3: Cross multiply
    625.25x = 862.55 × 404.27
  4. Step 4: Simplify right side
    625.25x = 348,696.75
  5. Step 5: Solve for x
    x = 348,696.75/625.25
  6. Step 6: Final answer
    x = 557.70

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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.