Home / 2,276.38-3,140.80-1,392.14

Finding the Fourth Proportional to 2,276.38, 3,140.80 and 1,392.14

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Solution

The fourth proportional to 2,276.38, 3,140.80 and 1,392.14 is: 1,920.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,276.38 : 3,140.80 = 1,392.14 : x
  2. Step 2: Convert to fraction form
    2,276.38/3,140.80 = 1,392.14/x
  3. Step 3: Cross multiply
    2,276.38x = 3,140.80 × 1,392.14
  4. Step 4: Simplify right side
    2,276.38x = 4,372,433.31
  5. Step 5: Solve for x
    x = 4,372,433.31/2,276.38
  6. Step 6: Final answer
    x = 1,920.78

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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.