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Finding the Fourth Proportional to 2,113.39, 3,168.36 and 881.72

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Solution

The fourth proportional to 2,113.39, 3,168.36 and 881.72 is: 1,321.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.39 : 3,168.36 = 881.72 : x
  2. Step 2: Convert to fraction form
    2,113.39/3,168.36 = 881.72/x
  3. Step 3: Cross multiply
    2,113.39x = 3,168.36 × 881.72
  4. Step 4: Simplify right side
    2,113.39x = 2,793,593.84
  5. Step 5: Solve for x
    x = 2,793,593.84/2,113.39
  6. Step 6: Final answer
    x = 1,321.86

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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.