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Finding the Third Proportional to 724.75 and 839.50

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Solution

The third proportional to 724.75 and 839.50 is: 972.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.75 : 839.50 = 839.50 : x
  2. Step 2: Convert to fraction form
    724.75/839.50 = 839.50/x
  3. Step 3: Cross multiply
    724.75x = 839.50 × 839.50
  4. Step 4: Simplify right side
    724.75x = 704,760.25
  5. Step 5: Solve for x
    x = 704,760.25/724.75
  6. Step 6: Final answer
    x = 972.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.