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Finding the Fourth Proportional to 655.38, 982.76 and 381.55

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Solution

The fourth proportional to 655.38, 982.76 and 381.55 is: 572.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.38 : 982.76 = 381.55 : x
  2. Step 2: Convert to fraction form
    655.38/982.76 = 381.55/x
  3. Step 3: Cross multiply
    655.38x = 982.76 × 381.55
  4. Step 4: Simplify right side
    655.38x = 374,965.26
  5. Step 5: Solve for x
    x = 374,965.26/655.38
  6. Step 6: Final answer
    x = 572.14

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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.