Home / 2,185.20-3,278.20-724.46

Finding the Fourth Proportional to 2,185.20, 3,278.20 and 724.46

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Solution

The fourth proportional to 2,185.20, 3,278.20 and 724.46 is: 1,086.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.20 : 3,278.20 = 724.46 : x
  2. Step 2: Convert to fraction form
    2,185.20/3,278.20 = 724.46/x
  3. Step 3: Cross multiply
    2,185.20x = 3,278.20 × 724.46
  4. Step 4: Simplify right side
    2,185.20x = 2,374,924.77
  5. Step 5: Solve for x
    x = 2,374,924.77/2,185.20
  6. Step 6: Final answer
    x = 1,086.82

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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.