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Finding the Fourth Proportional to 655.74, 983.32 and 381.92

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Solution

The fourth proportional to 655.74, 983.32 and 381.92 is: 572.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.74 : 983.32 = 381.92 : x
  2. Step 2: Convert to fraction form
    655.74/983.32 = 381.92/x
  3. Step 3: Cross multiply
    655.74x = 983.32 × 381.92
  4. Step 4: Simplify right side
    655.74x = 375,549.57
  5. Step 5: Solve for x
    x = 375,549.57/655.74
  6. Step 6: Final answer
    x = 572.71

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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.