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Finding the Third Proportional to 655.31 and 830.91

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Solution

The third proportional to 655.31 and 830.91 is: 1,053.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.31 : 830.91 = 830.91 : x
  2. Step 2: Convert to fraction form
    655.31/830.91 = 830.91/x
  3. Step 3: Cross multiply
    655.31x = 830.91 × 830.91
  4. Step 4: Simplify right side
    655.31x = 690,405.20
  5. Step 5: Solve for x
    x = 690,405.20/655.31
  6. Step 6: Final answer
    x = 1,053.55

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.