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Finding the Fourth Proportional to 2,113.85, 3,170.88 and 727.32

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Solution

The fourth proportional to 2,113.85, 3,170.88 and 727.32 is: 1,091.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.85 : 3,170.88 = 727.32 : x
  2. Step 2: Convert to fraction form
    2,113.85/3,170.88 = 727.32/x
  3. Step 3: Cross multiply
    2,113.85x = 3,170.88 × 727.32
  4. Step 4: Simplify right side
    2,113.85x = 2,306,244.44
  5. Step 5: Solve for x
    x = 2,306,244.44/2,113.85
  6. Step 6: Final answer
    x = 1,091.02

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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.