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Finding the Fourth Proportional to 2,238.47, 3,356.77 and 851.54

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Solution

The fourth proportional to 2,238.47, 3,356.77 and 851.54 is: 1,276.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,238.47 : 3,356.77 = 851.54 : x
  2. Step 2: Convert to fraction form
    2,238.47/3,356.77 = 851.54/x
  3. Step 3: Cross multiply
    2,238.47x = 3,356.77 × 851.54
  4. Step 4: Simplify right side
    2,238.47x = 2,858,423.93
  5. Step 5: Solve for x
    x = 2,858,423.93/2,238.47
  6. Step 6: Final answer
    x = 1,276.95

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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.