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Finding the Third Proportional to 655 and 713.50

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Solution

The third proportional to 655 and 713.50 is: 777.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    655 : 713.50 = 713.50 : x
  2. Step 2: Convert to fraction form
    655/713.50 = 713.50/x
  3. Step 3: Cross multiply
    655x = 713.50 × 713.50
  4. Step 4: Simplify right side
    655x = 509,082.25
  5. Step 5: Solve for x
    x = 509,082.25/655
  6. Step 6: Final answer
    x = 777.22

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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.