Home / 2,274.05-3,138.20-1,279.30

Finding the Fourth Proportional to 2,274.05, 3,138.20 and 1,279.30

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Solution

The fourth proportional to 2,274.05, 3,138.20 and 1,279.30 is: 1,765.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.05 : 3,138.20 = 1,279.30 : x
  2. Step 2: Convert to fraction form
    2,274.05/3,138.20 = 1,279.30/x
  3. Step 3: Cross multiply
    2,274.05x = 3,138.20 × 1,279.30
  4. Step 4: Simplify right side
    2,274.05x = 4,014,699.26
  5. Step 5: Solve for x
    x = 4,014,699.26/2,274.05
  6. Step 6: Final answer
    x = 1,765.44

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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.