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Finding the Fourth Proportional to 2,167.77, 3,251.93 and 851.35

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Solution

The fourth proportional to 2,167.77, 3,251.93 and 851.35 is: 1,277.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,167.77 : 3,251.93 = 851.35 : x
  2. Step 2: Convert to fraction form
    2,167.77/3,251.93 = 851.35/x
  3. Step 3: Cross multiply
    2,167.77x = 3,251.93 × 851.35
  4. Step 4: Simplify right side
    2,167.77x = 2,768,530.61
  5. Step 5: Solve for x
    x = 2,768,530.61/2,167.77
  6. Step 6: Final answer
    x = 1,277.13

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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.