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Finding the Fourth Proportional to 625.45, 862.81 and 404.59

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Solution

The fourth proportional to 625.45, 862.81 and 404.59 is: 558.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.45 : 862.81 = 404.59 : x
  2. Step 2: Convert to fraction form
    625.45/862.81 = 404.59/x
  3. Step 3: Cross multiply
    625.45x = 862.81 × 404.59
  4. Step 4: Simplify right side
    625.45x = 349,084.30
  5. Step 5: Solve for x
    x = 349,084.30/625.45
  6. Step 6: Final answer
    x = 558.13

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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.