Home / 1,947.92-2,688.20-1,063.78

Finding the Fourth Proportional to 1,947.92, 2,688.20 and 1,063.78

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Solution

The fourth proportional to 1,947.92, 2,688.20 and 1,063.78 is: 1,468.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.92 : 2,688.20 = 1,063.78 : x
  2. Step 2: Convert to fraction form
    1,947.92/2,688.20 = 1,063.78/x
  3. Step 3: Cross multiply
    1,947.92x = 2,688.20 × 1,063.78
  4. Step 4: Simplify right side
    1,947.92x = 2,859,653.40
  5. Step 5: Solve for x
    x = 2,859,653.40/1,947.92
  6. Step 6: Final answer
    x = 1,468.05

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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.