Home / 2,517.85-3,474.70-1,398.90

Finding the Fourth Proportional to 2,517.85, 3,474.70 and 1,398.90

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Solution

The fourth proportional to 2,517.85, 3,474.70 and 1,398.90 is: 1,930.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,517.85 : 3,474.70 = 1,398.90 : x
  2. Step 2: Convert to fraction form
    2,517.85/3,474.70 = 1,398.90/x
  3. Step 3: Cross multiply
    2,517.85x = 3,474.70 × 1,398.90
  4. Step 4: Simplify right side
    2,517.85x = 4,860,738.05
  5. Step 5: Solve for x
    x = 4,860,738.05/2,517.85
  6. Step 6: Final answer
    x = 1,930.51

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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.