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Finding the Third Proportional to 1,718.20 and 2,866.70

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Solution

The third proportional to 1,718.20 and 2,866.70 is: 4,782.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.20 : 2,866.70 = 2,866.70 : x
  2. Step 2: Convert to fraction form
    1,718.20/2,866.70 = 2,866.70/x
  3. Step 3: Cross multiply
    1,718.20x = 2,866.70 × 2,866.70
  4. Step 4: Simplify right side
    1,718.20x = 8,217,968.61
  5. Step 5: Solve for x
    x = 8,217,968.61/1,718.20
  6. Step 6: Final answer
    x = 4,782.88

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.