Home / 3,587.28-5,380.02-1,278.78

Finding the Fourth Proportional to 3,587.28, 5,380.02 and 1,278.78

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Solution

The fourth proportional to 3,587.28, 5,380.02 and 1,278.78 is: 1,917.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,587.28 : 5,380.02 = 1,278.78 : x
  2. Step 2: Convert to fraction form
    3,587.28/5,380.02 = 1,278.78/x
  3. Step 3: Cross multiply
    3,587.28x = 5,380.02 × 1,278.78
  4. Step 4: Simplify right side
    3,587.28x = 6,879,861.98
  5. Step 5: Solve for x
    x = 6,879,861.98/3,587.28
  6. Step 6: Final answer
    x = 1,917.85

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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.