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Finding the Third Proportional to 709.50 and 1,087.13

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Solution

The third proportional to 709.50 and 1,087.13 is: 1,665.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.50 : 1,087.13 = 1,087.13 : x
  2. Step 2: Convert to fraction form
    709.50/1,087.13 = 1,087.13/x
  3. Step 3: Cross multiply
    709.50x = 1,087.13 × 1,087.13
  4. Step 4: Simplify right side
    709.50x = 1,181,840.77
  5. Step 5: Solve for x
    x = 1,181,840.77/709.50
  6. Step 6: Final answer
    x = 1,665.74

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.