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Finding the Fourth Proportional to 3,959.40, 5,938.97 and 1,880.90

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Solution

The fourth proportional to 3,959.40, 5,938.97 and 1,880.90 is: 2,821.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.40 : 5,938.97 = 1,880.90 : x
  2. Step 2: Convert to fraction form
    3,959.40/5,938.97 = 1,880.90/x
  3. Step 3: Cross multiply
    3,959.40x = 5,938.97 × 1,880.90
  4. Step 4: Simplify right side
    3,959.40x = 11,170,578.98
  5. Step 5: Solve for x
    x = 11,170,578.98/3,959.40
  6. Step 6: Final answer
    x = 2,821.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.