Home / 1,331.26-1,838.24-979.15

Finding the Fourth Proportional to 1,331.26, 1,838.24 and 979.15

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Solution

The fourth proportional to 1,331.26, 1,838.24 and 979.15 is: 1,352.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.26 : 1,838.24 = 979.15 : x
  2. Step 2: Convert to fraction form
    1,331.26/1,838.24 = 979.15/x
  3. Step 3: Cross multiply
    1,331.26x = 1,838.24 × 979.15
  4. Step 4: Simplify right side
    1,331.26x = 1,799,912.70
  5. Step 5: Solve for x
    x = 1,799,912.70/1,331.26
  6. Step 6: Final answer
    x = 1,352.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.