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Finding the Third Proportional to 478.13 and 726.75

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Solution

The third proportional to 478.13 and 726.75 is: 1,104.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.13 : 726.75 = 726.75 : x
  2. Step 2: Convert to fraction form
    478.13/726.75 = 726.75/x
  3. Step 3: Cross multiply
    478.13x = 726.75 × 726.75
  4. Step 4: Simplify right side
    478.13x = 528,165.56
  5. Step 5: Solve for x
    x = 528,165.56/478.13
  6. Step 6: Final answer
    x = 1,104.66

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.