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Finding the Fourth Proportional to 2,757.81, 3,803.85 and 1,872.09

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Solution

The fourth proportional to 2,757.81, 3,803.85 and 1,872.09 is: 2,582.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,757.81 : 3,803.85 = 1,872.09 : x
  2. Step 2: Convert to fraction form
    2,757.81/3,803.85 = 1,872.09/x
  3. Step 3: Cross multiply
    2,757.81x = 3,803.85 × 1,872.09
  4. Step 4: Simplify right side
    2,757.81x = 7,121,149.55
  5. Step 5: Solve for x
    x = 7,121,149.55/2,757.81
  6. Step 6: Final answer
    x = 2,582.18

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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.