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Finding the Fourth Proportional to 2,185.46, 3,278.18 and 724.72

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Solution

The fourth proportional to 2,185.46, 3,278.18 and 724.72 is: 1,087.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.46 : 3,278.18 = 724.72 : x
  2. Step 2: Convert to fraction form
    2,185.46/3,278.18 = 724.72/x
  3. Step 3: Cross multiply
    2,185.46x = 3,278.18 × 724.72
  4. Step 4: Simplify right side
    2,185.46x = 2,375,762.61
  5. Step 5: Solve for x
    x = 2,375,762.61/2,185.46
  6. Step 6: Final answer
    x = 1,087.08

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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.