Home / 2,254.28-3,111.20-1,259.61

Finding the Fourth Proportional to 2,254.28, 3,111.20 and 1,259.61

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Solution

The fourth proportional to 2,254.28, 3,111.20 and 1,259.61 is: 1,738.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,254.28 : 3,111.20 = 1,259.61 : x
  2. Step 2: Convert to fraction form
    2,254.28/3,111.20 = 1,259.61/x
  3. Step 3: Cross multiply
    2,254.28x = 3,111.20 × 1,259.61
  4. Step 4: Simplify right side
    2,254.28x = 3,918,905.49
  5. Step 5: Solve for x
    x = 3,918,905.49/2,254.28
  6. Step 6: Final answer
    x = 1,738.43

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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.