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Finding the Third Proportional to 406.69 and 717.19

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Solution

The third proportional to 406.69 and 717.19 is: 1,264.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.69 : 717.19 = 717.19 : x
  2. Step 2: Convert to fraction form
    406.69/717.19 = 717.19/x
  3. Step 3: Cross multiply
    406.69x = 717.19 × 717.19
  4. Step 4: Simplify right side
    406.69x = 514,357.91
  5. Step 5: Solve for x
    x = 514,357.91/406.69
  6. Step 6: Final answer
    x = 1,264.75

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.