Home / 2,640.28-3,958.74-1,252.76

Finding the Fourth Proportional to 2,640.28, 3,958.74 and 1,252.76

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Solution

The fourth proportional to 2,640.28, 3,958.74 and 1,252.76 is: 1,878.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.28 : 3,958.74 = 1,252.76 : x
  2. Step 2: Convert to fraction form
    2,640.28/3,958.74 = 1,252.76/x
  3. Step 3: Cross multiply
    2,640.28x = 3,958.74 × 1,252.76
  4. Step 4: Simplify right side
    2,640.28x = 4,959,351.12
  5. Step 5: Solve for x
    x = 4,959,351.12/2,640.28
  6. Step 6: Final answer
    x = 1,878.34

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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.