Home / 1,947.76-2,687.86-1,108.45

Finding the Fourth Proportional to 1,947.76, 2,687.86 and 1,108.45

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Solution

The fourth proportional to 1,947.76, 2,687.86 and 1,108.45 is: 1,529.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.76 : 2,687.86 = 1,108.45 : x
  2. Step 2: Convert to fraction form
    1,947.76/2,687.86 = 1,108.45/x
  3. Step 3: Cross multiply
    1,947.76x = 2,687.86 × 1,108.45
  4. Step 4: Simplify right side
    1,947.76x = 2,979,358.42
  5. Step 5: Solve for x
    x = 2,979,358.42/1,947.76
  6. Step 6: Final answer
    x = 1,529.63

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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.