Home / 3,245.28-4,478.82-1,987.18

Finding the Fourth Proportional to 3,245.28, 4,478.82 and 1,987.18

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Solution

The fourth proportional to 3,245.28, 4,478.82 and 1,987.18 is: 2,742.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,245.28 : 4,478.82 = 1,987.18 : x
  2. Step 2: Convert to fraction form
    3,245.28/4,478.82 = 1,987.18/x
  3. Step 3: Cross multiply
    3,245.28x = 4,478.82 × 1,987.18
  4. Step 4: Simplify right side
    3,245.28x = 8,900,221.53
  5. Step 5: Solve for x
    x = 8,900,221.53/3,245.28
  6. Step 6: Final answer
    x = 2,742.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.