Home / 3,171.32-4,756.96-979.80

Finding the Fourth Proportional to 3,171.32, 4,756.96 and 979.80

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Solution

The fourth proportional to 3,171.32, 4,756.96 and 979.80 is: 1,469.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.32 : 4,756.96 = 979.80 : x
  2. Step 2: Convert to fraction form
    3,171.32/4,756.96 = 979.80/x
  3. Step 3: Cross multiply
    3,171.32x = 4,756.96 × 979.80
  4. Step 4: Simplify right side
    3,171.32x = 4,660,869.41
  5. Step 5: Solve for x
    x = 4,660,869.41/3,171.32
  6. Step 6: Final answer
    x = 1,469.69

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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.