Home / 3,171.18-4,757.27-979.39

Finding the Fourth Proportional to 3,171.18, 4,757.27 and 979.39

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Solution

The fourth proportional to 3,171.18, 4,757.27 and 979.39 is: 1,469.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.18 : 4,757.27 = 979.39 : x
  2. Step 2: Convert to fraction form
    3,171.18/4,757.27 = 979.39/x
  3. Step 3: Cross multiply
    3,171.18x = 4,757.27 × 979.39
  4. Step 4: Simplify right side
    3,171.18x = 4,659,222.67
  5. Step 5: Solve for x
    x = 4,659,222.67/3,171.18
  6. Step 6: Final answer
    x = 1,469.24

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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.