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Finding the Fourth Proportional to 655.72, 983.27 and 381.89

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Solution

The fourth proportional to 655.72, 983.27 and 381.89 is: 572.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.72 : 983.27 = 381.89 : x
  2. Step 2: Convert to fraction form
    655.72/983.27 = 381.89/x
  3. Step 3: Cross multiply
    655.72x = 983.27 × 381.89
  4. Step 4: Simplify right side
    655.72x = 375,504.39
  5. Step 5: Solve for x
    x = 375,504.39/655.72
  6. Step 6: Final answer
    x = 572.66

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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.