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Finding the Third Proportional to 401.25 and 625.88

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Solution

The third proportional to 401.25 and 625.88 is: 976.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.25 : 625.88 = 625.88 : x
  2. Step 2: Convert to fraction form
    401.25/625.88 = 625.88/x
  3. Step 3: Cross multiply
    401.25x = 625.88 × 625.88
  4. Step 4: Simplify right side
    401.25x = 391,719.52
  5. Step 5: Solve for x
    x = 391,719.52/401.25
  6. Step 6: Final answer
    x = 976.25

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.