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Finding the Fourth Proportional to 3,167.62, 4,372.87 and 1,989.34

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Solution

The fourth proportional to 3,167.62, 4,372.87 and 1,989.34 is: 2,746.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,167.62 : 4,372.87 = 1,989.34 : x
  2. Step 2: Convert to fraction form
    3,167.62/4,372.87 = 1,989.34/x
  3. Step 3: Cross multiply
    3,167.62x = 4,372.87 × 1,989.34
  4. Step 4: Simplify right side
    3,167.62x = 8,699,103.34
  5. Step 5: Solve for x
    x = 8,699,103.34/3,167.62
  6. Step 6: Final answer
    x = 2,746.26

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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.