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Finding the Third Proportional to 622.31 and 747.19

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Solution

The third proportional to 622.31 and 747.19 is: 897.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.31 : 747.19 = 747.19 : x
  2. Step 2: Convert to fraction form
    622.31/747.19 = 747.19/x
  3. Step 3: Cross multiply
    622.31x = 747.19 × 747.19
  4. Step 4: Simplify right side
    622.31x = 558,289.16
  5. Step 5: Solve for x
    x = 558,289.16/622.31
  6. Step 6: Final answer
    x = 897.12

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.