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Finding the Third Proportional to 372.50 and 790.75

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Solution

The third proportional to 372.50 and 790.75 is: 1,678.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.50 : 790.75 = 790.75 : x
  2. Step 2: Convert to fraction form
    372.50/790.75 = 790.75/x
  3. Step 3: Cross multiply
    372.50x = 790.75 × 790.75
  4. Step 4: Simplify right side
    372.50x = 625,285.56
  5. Step 5: Solve for x
    x = 625,285.56/372.50
  6. Step 6: Final answer
    x = 1,678.62

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.