Home / 2,581.28-3,872.40-1,657.76

Finding the Fourth Proportional to 2,581.28, 3,872.40 and 1,657.76

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Solution

The fourth proportional to 2,581.28, 3,872.40 and 1,657.76 is: 2,486.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,581.28 : 3,872.40 = 1,657.76 : x
  2. Step 2: Convert to fraction form
    2,581.28/3,872.40 = 1,657.76/x
  3. Step 3: Cross multiply
    2,581.28x = 3,872.40 × 1,657.76
  4. Step 4: Simplify right side
    2,581.28x = 6,419,509.82
  5. Step 5: Solve for x
    x = 6,419,509.82/2,581.28
  6. Step 6: Final answer
    x = 2,486.95

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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.