Home / 3,107.42-4,288.32-1,691.20

Finding the Fourth Proportional to 3,107.42, 4,288.32 and 1,691.20

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Solution

The fourth proportional to 3,107.42, 4,288.32 and 1,691.20 is: 2,333.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.42 : 4,288.32 = 1,691.20 : x
  2. Step 2: Convert to fraction form
    3,107.42/4,288.32 = 1,691.20/x
  3. Step 3: Cross multiply
    3,107.42x = 4,288.32 × 1,691.20
  4. Step 4: Simplify right side
    3,107.42x = 7,252,406.78
  5. Step 5: Solve for x
    x = 7,252,406.78/3,107.42
  6. Step 6: Final answer
    x = 2,333.90

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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.