Home / 1,947.71-2,687.77-1,108.45

Finding the Fourth Proportional to 1,947.71, 2,687.77 and 1,108.45

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Solution

The fourth proportional to 1,947.71, 2,687.77 and 1,108.45 is: 1,529.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.71 : 2,687.77 = 1,108.45 : x
  2. Step 2: Convert to fraction form
    1,947.71/2,687.77 = 1,108.45/x
  3. Step 3: Cross multiply
    1,947.71x = 2,687.77 × 1,108.45
  4. Step 4: Simplify right side
    1,947.71x = 2,979,258.66
  5. Step 5: Solve for x
    x = 2,979,258.66/1,947.71
  6. Step 6: Final answer
    x = 1,529.62

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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.