Home / 2,185.68-3,278.34-724.35

Finding the Fourth Proportional to 2,185.68, 3,278.34 and 724.35

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Solution

The fourth proportional to 2,185.68, 3,278.34 and 724.35 is: 1,086.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.68 : 3,278.34 = 724.35 : x
  2. Step 2: Convert to fraction form
    2,185.68/3,278.34 = 724.35/x
  3. Step 3: Cross multiply
    2,185.68x = 3,278.34 × 724.35
  4. Step 4: Simplify right side
    2,185.68x = 2,374,665.58
  5. Step 5: Solve for x
    x = 2,374,665.58/2,185.68
  6. Step 6: Final answer
    x = 1,086.47

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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.