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Finding the Fourth Proportional to 3,171.62, 4,377 and 1,755.30

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Solution

The fourth proportional to 3,171.62, 4,377 and 1,755.30 is: 2,422.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.62 : 4,377 = 1,755.30 : x
  2. Step 2: Convert to fraction form
    3,171.62/4,377 = 1,755.30/x
  3. Step 3: Cross multiply
    3,171.62x = 4,377 × 1,755.30
  4. Step 4: Simplify right side
    3,171.62x = 7,682,948.10
  5. Step 5: Solve for x
    x = 7,682,948.10/3,171.62
  6. Step 6: Final answer
    x = 2,422.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.