Home / 2,275.43-3,140.24-1,280.61

Finding the Fourth Proportional to 2,275.43, 3,140.24 and 1,280.61

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Solution

The fourth proportional to 2,275.43, 3,140.24 and 1,280.61 is: 1,767.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.43 : 3,140.24 = 1,280.61 : x
  2. Step 2: Convert to fraction form
    2,275.43/3,140.24 = 1,280.61/x
  3. Step 3: Cross multiply
    2,275.43x = 3,140.24 × 1,280.61
  4. Step 4: Simplify right side
    2,275.43x = 4,021,416.34
  5. Step 5: Solve for x
    x = 4,021,416.34/2,275.43
  6. Step 6: Final answer
    x = 1,767.33

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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.