Home / 2,439.57-3,659.35-979.74

Finding the Fourth Proportional to 2,439.57, 3,659.35 and 979.74

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Solution

The fourth proportional to 2,439.57, 3,659.35 and 979.74 is: 1,469.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,439.57 : 3,659.35 = 979.74 : x
  2. Step 2: Convert to fraction form
    2,439.57/3,659.35 = 979.74/x
  3. Step 3: Cross multiply
    2,439.57x = 3,659.35 × 979.74
  4. Step 4: Simplify right side
    2,439.57x = 3,585,211.57
  5. Step 5: Solve for x
    x = 3,585,211.57/2,439.57
  6. Step 6: Final answer
    x = 1,469.61

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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.