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Finding the Third Proportional to 729 and 1,058.91

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Solution

The third proportional to 729 and 1,058.91 is: 1,538.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    729 : 1,058.91 = 1,058.91 : x
  2. Step 2: Convert to fraction form
    729/1,058.91 = 1,058.91/x
  3. Step 3: Cross multiply
    729x = 1,058.91 × 1,058.91
  4. Step 4: Simplify right side
    729x = 1,121,282.45
  5. Step 5: Solve for x
    x = 1,121,282.45/729
  6. Step 6: Final answer
    x = 1,538.11

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.