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Finding the Third Proportional to 1,284.50 and 1,668.75

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Solution

The third proportional to 1,284.50 and 1,668.75 is: 2,167.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.50 : 1,668.75 = 1,668.75 : x
  2. Step 2: Convert to fraction form
    1,284.50/1,668.75 = 1,668.75/x
  3. Step 3: Cross multiply
    1,284.50x = 1,668.75 × 1,668.75
  4. Step 4: Simplify right side
    1,284.50x = 2,784,726.56
  5. Step 5: Solve for x
    x = 2,784,726.56/1,284.50
  6. Step 6: Final answer
    x = 2,167.95

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.