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Finding the Third Proportional to 720.75 and 1,666.88

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Solution

The third proportional to 720.75 and 1,666.88 is: 3,854.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.75 : 1,666.88 = 1,666.88 : x
  2. Step 2: Convert to fraction form
    720.75/1,666.88 = 1,666.88/x
  3. Step 3: Cross multiply
    720.75x = 1,666.88 × 1,666.88
  4. Step 4: Simplify right side
    720.75x = 2,778,472.27
  5. Step 5: Solve for x
    x = 2,778,472.27/720.75
  6. Step 6: Final answer
    x = 3,854.97

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.