Home / 3,943.80-5,443.20-2,885.40

Finding the Fourth Proportional to 3,943.80, 5,443.20 and 2,885.40

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Solution

The fourth proportional to 3,943.80, 5,443.20 and 2,885.40 is: 3,982.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,943.80 : 5,443.20 = 2,885.40 : x
  2. Step 2: Convert to fraction form
    3,943.80/5,443.20 = 2,885.40/x
  3. Step 3: Cross multiply
    3,943.80x = 5,443.20 × 2,885.40
  4. Step 4: Simplify right side
    3,943.80x = 15,705,809.28
  5. Step 5: Solve for x
    x = 15,705,809.28/3,943.80
  6. Step 6: Final answer
    x = 3,982.41

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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.