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Finding the Fourth Proportional to 2,640.03, 3,960.04 and 1,079.76

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Solution

The fourth proportional to 2,640.03, 3,960.04 and 1,079.76 is: 1,619.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.03 : 3,960.04 = 1,079.76 : x
  2. Step 2: Convert to fraction form
    2,640.03/3,960.04 = 1,079.76/x
  3. Step 3: Cross multiply
    2,640.03x = 3,960.04 × 1,079.76
  4. Step 4: Simplify right side
    2,640.03x = 4,275,884.69
  5. Step 5: Solve for x
    x = 4,275,884.69/2,640.03
  6. Step 6: Final answer
    x = 1,619.64

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Similar ratio
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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.