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Finding the Third Proportional to 1,115 and 1,726.25

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Solution

The third proportional to 1,115 and 1,726.25 is: 2,672.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115 : 1,726.25 = 1,726.25 : x
  2. Step 2: Convert to fraction form
    1,115/1,726.25 = 1,726.25/x
  3. Step 3: Cross multiply
    1,115x = 1,726.25 × 1,726.25
  4. Step 4: Simplify right side
    1,115x = 2,979,939.06
  5. Step 5: Solve for x
    x = 2,979,939.06/1,115
  6. Step 6: Final answer
    x = 2,672.59

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.