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Finding the Third Proportional to 661.50 and 927.28

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Solution

The third proportional to 661.50 and 927.28 is: 1,299.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.50 : 927.28 = 927.28 : x
  2. Step 2: Convert to fraction form
    661.50/927.28 = 927.28/x
  3. Step 3: Cross multiply
    661.50x = 927.28 × 927.28
  4. Step 4: Simplify right side
    661.50x = 859,850.52
  5. Step 5: Solve for x
    x = 859,850.52/661.50
  6. Step 6: Final answer
    x = 1,299.85

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.