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Finding the Fourth Proportional to 664.89, 917.55 and 432.42

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Solution

The fourth proportional to 664.89, 917.55 and 432.42 is: 596.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.89 : 917.55 = 432.42 : x
  2. Step 2: Convert to fraction form
    664.89/917.55 = 432.42/x
  3. Step 3: Cross multiply
    664.89x = 917.55 × 432.42
  4. Step 4: Simplify right side
    664.89x = 396,766.97
  5. Step 5: Solve for x
    x = 396,766.97/664.89
  6. Step 6: Final answer
    x = 596.74

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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.