Home / 2,274.20-3,138.36-1,279.47

Finding the Fourth Proportional to 2,274.20, 3,138.36 and 1,279.47

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Solution

The fourth proportional to 2,274.20, 3,138.36 and 1,279.47 is: 1,765.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.20 : 3,138.36 = 1,279.47 : x
  2. Step 2: Convert to fraction form
    2,274.20/3,138.36 = 1,279.47/x
  3. Step 3: Cross multiply
    2,274.20x = 3,138.36 × 1,279.47
  4. Step 4: Simplify right side
    2,274.20x = 4,015,437.47
  5. Step 5: Solve for x
    x = 4,015,437.47/2,274.20
  6. Step 6: Final answer
    x = 1,765.65

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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.