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Finding the Fourth Proportional to 3,171.33, 4,756.96 and 979.81

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Solution

The fourth proportional to 3,171.33, 4,756.96 and 979.81 is: 1,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.33 : 4,756.96 = 979.81 : x
  2. Step 2: Convert to fraction form
    3,171.33/4,756.96 = 979.81/x
  3. Step 3: Cross multiply
    3,171.33x = 4,756.96 × 979.81
  4. Step 4: Simplify right side
    3,171.33x = 4,660,916.98
  5. Step 5: Solve for x
    x = 4,660,916.98/3,171.33
  6. Step 6: Final answer
    x = 1,469.70

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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.