Home / 3,108.80-4,290.12-1,711.55

Finding the Fourth Proportional to 3,108.80, 4,290.12 and 1,711.55

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Solution

The fourth proportional to 3,108.80, 4,290.12 and 1,711.55 is: 2,361.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.80 : 4,290.12 = 1,711.55 : x
  2. Step 2: Convert to fraction form
    3,108.80/4,290.12 = 1,711.55/x
  3. Step 3: Cross multiply
    3,108.80x = 4,290.12 × 1,711.55
  4. Step 4: Simplify right side
    3,108.80x = 7,342,765.61
  5. Step 5: Solve for x
    x = 7,342,765.61/3,108.80
  6. Step 6: Final answer
    x = 2,361.93

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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.