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Finding the Third Proportional to 611.06 and 870.66

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Solution

The third proportional to 611.06 and 870.66 is: 1,240.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.06 : 870.66 = 870.66 : x
  2. Step 2: Convert to fraction form
    611.06/870.66 = 870.66/x
  3. Step 3: Cross multiply
    611.06x = 870.66 × 870.66
  4. Step 4: Simplify right side
    611.06x = 758,042.31
  5. Step 5: Solve for x
    x = 758,042.31/611.06
  6. Step 6: Final answer
    x = 1,240.53

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.