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Finding the Fourth Proportional to 649.62, 976.29 and 625.38

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Solution

The fourth proportional to 649.62, 976.29 and 625.38 is: 939.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.62 : 976.29 = 625.38 : x
  2. Step 2: Convert to fraction form
    649.62/976.29 = 625.38/x
  3. Step 3: Cross multiply
    649.62x = 976.29 × 625.38
  4. Step 4: Simplify right side
    649.62x = 610,552.24
  5. Step 5: Solve for x
    x = 610,552.24/649.62
  6. Step 6: Final answer
    x = 939.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.