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Finding the Third Proportional to 679.13 and 1,054.88

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Solution

The third proportional to 679.13 and 1,054.88 is: 1,638.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.13 : 1,054.88 = 1,054.88 : x
  2. Step 2: Convert to fraction form
    679.13/1,054.88 = 1,054.88/x
  3. Step 3: Cross multiply
    679.13x = 1,054.88 × 1,054.88
  4. Step 4: Simplify right side
    679.13x = 1,112,761.27
  5. Step 5: Solve for x
    x = 1,112,761.27/679.13
  6. Step 6: Final answer
    x = 1,638.52

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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.