Home / 3,869.24-5,340.42-2,378.45

Finding the Fourth Proportional to 3,869.24, 5,340.42 and 2,378.45

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Solution

The fourth proportional to 3,869.24, 5,340.42 and 2,378.45 is: 3,282.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.24 : 5,340.42 = 2,378.45 : x
  2. Step 2: Convert to fraction form
    3,869.24/5,340.42 = 2,378.45/x
  3. Step 3: Cross multiply
    3,869.24x = 5,340.42 × 2,378.45
  4. Step 4: Simplify right side
    3,869.24x = 12,701,921.95
  5. Step 5: Solve for x
    x = 12,701,921.95/3,869.24
  6. Step 6: Final answer
    x = 3,282.80

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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.