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Finding the Fourth Proportional to 2,872.46, 4,308.12 and 791.93

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Solution

The fourth proportional to 2,872.46, 4,308.12 and 791.93 is: 1,187.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.46 : 4,308.12 = 791.93 : x
  2. Step 2: Convert to fraction form
    2,872.46/4,308.12 = 791.93/x
  3. Step 3: Cross multiply
    2,872.46x = 4,308.12 × 791.93
  4. Step 4: Simplify right side
    2,872.46x = 3,411,729.47
  5. Step 5: Solve for x
    x = 3,411,729.47/2,872.46
  6. Step 6: Final answer
    x = 1,187.74

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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.