Home / 2,274.47-3,138.78-1,279.75

Finding the Fourth Proportional to 2,274.47, 3,138.78 and 1,279.75

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Solution

The fourth proportional to 2,274.47, 3,138.78 and 1,279.75 is: 1,766.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.47 : 3,138.78 = 1,279.75 : x
  2. Step 2: Convert to fraction form
    2,274.47/3,138.78 = 1,279.75/x
  3. Step 3: Cross multiply
    2,274.47x = 3,138.78 × 1,279.75
  4. Step 4: Simplify right side
    2,274.47x = 4,016,853.71
  5. Step 5: Solve for x
    x = 4,016,853.71/2,274.47
  6. Step 6: Final answer
    x = 1,766.06

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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.