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Finding the Third Proportional to 742.88 and 877.88

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Solution

The third proportional to 742.88 and 877.88 is: 1,037.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.88 : 877.88 = 877.88 : x
  2. Step 2: Convert to fraction form
    742.88/877.88 = 877.88/x
  3. Step 3: Cross multiply
    742.88x = 877.88 × 877.88
  4. Step 4: Simplify right side
    742.88x = 770,664.52
  5. Step 5: Solve for x
    x = 770,664.52/742.88
  6. Step 6: Final answer
    x = 1,037.41

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.