Home / 2,275.92-3,140.78-1,281.19

Finding the Fourth Proportional to 2,275.92, 3,140.78 and 1,281.19

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Solution

The fourth proportional to 2,275.92, 3,140.78 and 1,281.19 is: 1,768.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.92 : 3,140.78 = 1,281.19 : x
  2. Step 2: Convert to fraction form
    2,275.92/3,140.78 = 1,281.19/x
  3. Step 3: Cross multiply
    2,275.92x = 3,140.78 × 1,281.19
  4. Step 4: Simplify right side
    2,275.92x = 4,023,935.93
  5. Step 5: Solve for x
    x = 4,023,935.93/2,275.92
  6. Step 6: Final answer
    x = 1,768.05

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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.