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Finding the Third Proportional to 655.59 and 716.34

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Solution

The third proportional to 655.59 and 716.34 is: 782.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.59 : 716.34 = 716.34 : x
  2. Step 2: Convert to fraction form
    655.59/716.34 = 716.34/x
  3. Step 3: Cross multiply
    655.59x = 716.34 × 716.34
  4. Step 4: Simplify right side
    655.59x = 513,148.37
  5. Step 5: Solve for x
    x = 513,148.37/655.59
  6. Step 6: Final answer
    x = 782.72

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.