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Finding the Fourth Proportional to 625.40, 932.40 and 609.43

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Solution

The fourth proportional to 625.40, 932.40 and 609.43 is: 908.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.40 : 932.40 = 609.43 : x
  2. Step 2: Convert to fraction form
    625.40/932.40 = 609.43/x
  3. Step 3: Cross multiply
    625.40x = 932.40 × 609.43
  4. Step 4: Simplify right side
    625.40x = 568,227.87
  5. Step 5: Solve for x
    x = 568,227.87/625.40
  6. Step 6: Final answer
    x = 908.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.