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Finding the Fourth Proportional to 664.92, 991.89 and 632.52

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Solution

The fourth proportional to 664.92, 991.89 and 632.52 is: 943.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.92 : 991.89 = 632.52 : x
  2. Step 2: Convert to fraction form
    664.92/991.89 = 632.52/x
  3. Step 3: Cross multiply
    664.92x = 991.89 × 632.52
  4. Step 4: Simplify right side
    664.92x = 627,390.26
  5. Step 5: Solve for x
    x = 627,390.26/664.92
  6. Step 6: Final answer
    x = 943.56

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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.