Home / 2,439.80-3,366.90-1,320.71

Finding the Fourth Proportional to 2,439.80, 3,366.90 and 1,320.71

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Solution

The fourth proportional to 2,439.80, 3,366.90 and 1,320.71 is: 1,822.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,439.80 : 3,366.90 = 1,320.71 : x
  2. Step 2: Convert to fraction form
    2,439.80/3,366.90 = 1,320.71/x
  3. Step 3: Cross multiply
    2,439.80x = 3,366.90 × 1,320.71
  4. Step 4: Simplify right side
    2,439.80x = 4,446,708.54
  5. Step 5: Solve for x
    x = 4,446,708.54/2,439.80
  6. Step 6: Final answer
    x = 1,822.57

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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.