Home / 3,431.20-5,138.70-2,329.60

Finding the Fourth Proportional to 3,431.20, 5,138.70 and 2,329.60

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Solution

The fourth proportional to 3,431.20, 5,138.70 and 2,329.60 is: 3,488.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.20 : 5,138.70 = 2,329.60 : x
  2. Step 2: Convert to fraction form
    3,431.20/5,138.70 = 2,329.60/x
  3. Step 3: Cross multiply
    3,431.20x = 5,138.70 × 2,329.60
  4. Step 4: Simplify right side
    3,431.20x = 11,971,115.52
  5. Step 5: Solve for x
    x = 11,971,115.52/3,431.20
  6. Step 6: Final answer
    x = 3,488.90

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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.