Home / 3,615.12-5,428.68-2,255.76

Finding the Fourth Proportional to 3,615.12, 5,428.68 and 2,255.76

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Solution

The fourth proportional to 3,615.12, 5,428.68 and 2,255.76 is: 3,387.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,615.12 : 5,428.68 = 2,255.76 : x
  2. Step 2: Convert to fraction form
    3,615.12/5,428.68 = 2,255.76/x
  3. Step 3: Cross multiply
    3,615.12x = 5,428.68 × 2,255.76
  4. Step 4: Simplify right side
    3,615.12x = 12,245,799.20
  5. Step 5: Solve for x
    x = 12,245,799.20/3,615.12
  6. Step 6: Final answer
    x = 3,387.38

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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.