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Finding the Fourth Proportional to 2,872.74, 3,964.55 and 1,613.90

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Solution

The fourth proportional to 2,872.74, 3,964.55 and 1,613.90 is: 2,227.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.74 : 3,964.55 = 1,613.90 : x
  2. Step 2: Convert to fraction form
    2,872.74/3,964.55 = 1,613.90/x
  3. Step 3: Cross multiply
    2,872.74x = 3,964.55 × 1,613.90
  4. Step 4: Simplify right side
    2,872.74x = 6,398,359.35
  5. Step 5: Solve for x
    x = 6,398,359.35/2,872.74
  6. Step 6: Final answer
    x = 2,227.27

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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.