Home / 3,439.87-4,746.47-1,947.78

Finding the Fourth Proportional to 3,439.87, 4,746.47 and 1,947.78

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Solution

The fourth proportional to 3,439.87, 4,746.47 and 1,947.78 is: 2,687.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,439.87 : 4,746.47 = 1,947.78 : x
  2. Step 2: Convert to fraction form
    3,439.87/4,746.47 = 1,947.78/x
  3. Step 3: Cross multiply
    3,439.87x = 4,746.47 × 1,947.78
  4. Step 4: Simplify right side
    3,439.87x = 9,245,069.60
  5. Step 5: Solve for x
    x = 9,245,069.60/3,439.87
  6. Step 6: Final answer
    x = 2,687.62

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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.