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Finding the Fourth Proportional to 3,171.06, 4,755.90 and 979.20

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Solution

The fourth proportional to 3,171.06, 4,755.90 and 979.20 is: 1,468.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.06 : 4,755.90 = 979.20 : x
  2. Step 2: Convert to fraction form
    3,171.06/4,755.90 = 979.20/x
  3. Step 3: Cross multiply
    3,171.06x = 4,755.90 × 979.20
  4. Step 4: Simplify right side
    3,171.06x = 4,656,977.28
  5. Step 5: Solve for x
    x = 4,656,977.28/3,171.06
  6. Step 6: Final answer
    x = 1,468.59

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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.