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Finding the Fourth Proportional to 2,186, 3,278.67 and 724.97

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Solution

The fourth proportional to 2,186, 3,278.67 and 724.97 is: 1,087.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,186 : 3,278.67 = 724.97 : x
  2. Step 2: Convert to fraction form
    2,186/3,278.67 = 724.97/x
  3. Step 3: Cross multiply
    2,186x = 3,278.67 × 724.97
  4. Step 4: Simplify right side
    2,186x = 2,376,937.39
  5. Step 5: Solve for x
    x = 2,376,937.39/2,186
  6. Step 6: Final answer
    x = 1,087.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.