Home / 2,274.21-3,138.65-1,279.46

Finding the Fourth Proportional to 2,274.21, 3,138.65 and 1,279.46

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Solution

The fourth proportional to 2,274.21, 3,138.65 and 1,279.46 is: 1,765.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.21 : 3,138.65 = 1,279.46 : x
  2. Step 2: Convert to fraction form
    2,274.21/3,138.65 = 1,279.46/x
  3. Step 3: Cross multiply
    2,274.21x = 3,138.65 × 1,279.46
  4. Step 4: Simplify right side
    2,274.21x = 4,015,777.13
  5. Step 5: Solve for x
    x = 4,015,777.13/2,274.21
  6. Step 6: Final answer
    x = 1,765.79

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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.