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Finding the Fourth Proportional to 611.52, 843.92 and 331.77

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Solution

The fourth proportional to 611.52, 843.92 and 331.77 is: 457.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.52 : 843.92 = 331.77 : x
  2. Step 2: Convert to fraction form
    611.52/843.92 = 331.77/x
  3. Step 3: Cross multiply
    611.52x = 843.92 × 331.77
  4. Step 4: Simplify right side
    611.52x = 279,987.71
  5. Step 5: Solve for x
    x = 279,987.71/611.52
  6. Step 6: Final answer
    x = 457.85

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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.