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Finding the Third Proportional to 717.61 and 1,520.65

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Solution

The third proportional to 717.61 and 1,520.65 is: 3,222.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.61 : 1,520.65 = 1,520.65 : x
  2. Step 2: Convert to fraction form
    717.61/1,520.65 = 1,520.65/x
  3. Step 3: Cross multiply
    717.61x = 1,520.65 × 1,520.65
  4. Step 4: Simplify right side
    717.61x = 2,312,371.67
  5. Step 5: Solve for x
    x = 2,312,371.67/717.61
  6. Step 6: Final answer
    x = 3,222.33

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.