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Finding the Third Proportional to 718.50 and 986.25

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Solution

The third proportional to 718.50 and 986.25 is: 1,353.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.50 : 986.25 = 986.25 : x
  2. Step 2: Convert to fraction form
    718.50/986.25 = 986.25/x
  3. Step 3: Cross multiply
    718.50x = 986.25 × 986.25
  4. Step 4: Simplify right side
    718.50x = 972,689.06
  5. Step 5: Solve for x
    x = 972,689.06/718.50
  6. Step 6: Final answer
    x = 1,353.78

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.