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Finding the Third Proportional to 415.75 and 527.50

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Solution

The third proportional to 415.75 and 527.50 is: 669.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.75 : 527.50 = 527.50 : x
  2. Step 2: Convert to fraction form
    415.75/527.50 = 527.50/x
  3. Step 3: Cross multiply
    415.75x = 527.50 × 527.50
  4. Step 4: Simplify right side
    415.75x = 278,256.25
  5. Step 5: Solve for x
    x = 278,256.25/415.75
  6. Step 6: Final answer
    x = 669.29

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.