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Finding the Third Proportional to 615.75 and 922.13

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Solution

The third proportional to 615.75 and 922.13 is: 1,380.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.75 : 922.13 = 922.13 : x
  2. Step 2: Convert to fraction form
    615.75/922.13 = 922.13/x
  3. Step 3: Cross multiply
    615.75x = 922.13 × 922.13
  4. Step 4: Simplify right side
    615.75x = 850,314.52
  5. Step 5: Solve for x
    x = 850,314.52/615.75
  6. Step 6: Final answer
    x = 1,380.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.