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Finding the Fourth Proportional to 664.88, 994.32 and 649.52

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Solution

The fourth proportional to 664.88, 994.32 and 649.52 is: 971.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.88 : 994.32 = 649.52 : x
  2. Step 2: Convert to fraction form
    664.88/994.32 = 649.52/x
  3. Step 3: Cross multiply
    664.88x = 994.32 × 649.52
  4. Step 4: Simplify right side
    664.88x = 645,830.73
  5. Step 5: Solve for x
    x = 645,830.73/664.88
  6. Step 6: Final answer
    x = 971.35

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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.