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Finding the Third Proportional to 56.25 and 71.25

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Solution

The third proportional to 56.25 and 71.25 is: 90.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.25 : 71.25 = 71.25 : x
  2. Step 2: Convert to fraction form
    56.25/71.25 = 71.25/x
  3. Step 3: Cross multiply
    56.25x = 71.25 × 71.25
  4. Step 4: Simplify right side
    56.25x = 5,076.56
  5. Step 5: Solve for x
    x = 5,076.56/56.25
  6. Step 6: Final answer
    x = 90.25

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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.