Home / 2,275.65-3,140.24-1,280.81

Finding the Fourth Proportional to 2,275.65, 3,140.24 and 1,280.81

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Solution

The fourth proportional to 2,275.65, 3,140.24 and 1,280.81 is: 1,767.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.65 : 3,140.24 = 1,280.81 : x
  2. Step 2: Convert to fraction form
    2,275.65/3,140.24 = 1,280.81/x
  3. Step 3: Cross multiply
    2,275.65x = 3,140.24 × 1,280.81
  4. Step 4: Simplify right side
    2,275.65x = 4,022,052.24
  5. Step 5: Solve for x
    x = 4,022,052.24/2,275.65
  6. Step 6: Final answer
    x = 1,767.43

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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.