Home / 2,275.24-3,139.70-1,280.46

Finding the Fourth Proportional to 2,275.24, 3,139.70 and 1,280.46

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Solution

The fourth proportional to 2,275.24, 3,139.70 and 1,280.46 is: 1,766.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.24 : 3,139.70 = 1,280.46 : x
  2. Step 2: Convert to fraction form
    2,275.24/3,139.70 = 1,280.46/x
  3. Step 3: Cross multiply
    2,275.24x = 3,139.70 × 1,280.46
  4. Step 4: Simplify right side
    2,275.24x = 4,020,260.26
  5. Step 5: Solve for x
    x = 4,020,260.26/2,275.24
  6. Step 6: Final answer
    x = 1,766.96

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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.