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Finding the Fourth Proportional to 2,867.99, 3,957.85 and 1,872.68

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Solution

The fourth proportional to 2,867.99, 3,957.85 and 1,872.68 is: 2,584.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,867.99 : 3,957.85 = 1,872.68 : x
  2. Step 2: Convert to fraction form
    2,867.99/3,957.85 = 1,872.68/x
  3. Step 3: Cross multiply
    2,867.99x = 3,957.85 × 1,872.68
  4. Step 4: Simplify right side
    2,867.99x = 7,411,786.54
  5. Step 5: Solve for x
    x = 7,411,786.54/2,867.99
  6. Step 6: Final answer
    x = 2,584.31

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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.