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Finding the Third Proportional to 486.38 and 655.31

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Solution

The third proportional to 486.38 and 655.31 is: 882.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.38 : 655.31 = 655.31 : x
  2. Step 2: Convert to fraction form
    486.38/655.31 = 655.31/x
  3. Step 3: Cross multiply
    486.38x = 655.31 × 655.31
  4. Step 4: Simplify right side
    486.38x = 429,434.47
  5. Step 5: Solve for x
    x = 429,434.47/486.38
  6. Step 6: Final answer
    x = 882.93

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.