Home / 1,947.68-2,688.20-1,108.44

Finding the Fourth Proportional to 1,947.68, 2,688.20 and 1,108.44

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Solution

The fourth proportional to 1,947.68, 2,688.20 and 1,108.44 is: 1,529.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.68 : 2,688.20 = 1,108.44 : x
  2. Step 2: Convert to fraction form
    1,947.68/2,688.20 = 1,108.44/x
  3. Step 3: Cross multiply
    1,947.68x = 2,688.20 × 1,108.44
  4. Step 4: Simplify right side
    1,947.68x = 2,979,708.41
  5. Step 5: Solve for x
    x = 2,979,708.41/1,947.68
  6. Step 6: Final answer
    x = 1,529.88

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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.