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Finding the Fourth Proportional to 2,185.93, 3,278.61 and 725.11

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Solution

The fourth proportional to 2,185.93, 3,278.61 and 725.11 is: 1,087.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.93 : 3,278.61 = 725.11 : x
  2. Step 2: Convert to fraction form
    2,185.93/3,278.61 = 725.11/x
  3. Step 3: Cross multiply
    2,185.93x = 3,278.61 × 725.11
  4. Step 4: Simplify right side
    2,185.93x = 2,377,352.90
  5. Step 5: Solve for x
    x = 2,377,352.90/2,185.93
  6. Step 6: Final answer
    x = 1,087.57

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1.5x scale

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.