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Finding the Third Proportional to 631.88 and 712.88

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Solution

The third proportional to 631.88 and 712.88 is: 804.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.88 : 712.88 = 712.88 : x
  2. Step 2: Convert to fraction form
    631.88/712.88 = 712.88/x
  3. Step 3: Cross multiply
    631.88x = 712.88 × 712.88
  4. Step 4: Simplify right side
    631.88x = 508,190.77
  5. Step 5: Solve for x
    x = 508,190.77/631.88
  6. Step 6: Final answer
    x = 804.26

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.