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Finding the Fourth Proportional to 610.75, 842.84 and 331.00

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Solution

The fourth proportional to 610.75, 842.84 and 331.00 is: 456.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.75 : 842.84 = 331.00 : x
  2. Step 2: Convert to fraction form
    610.75/842.84 = 331.00/x
  3. Step 3: Cross multiply
    610.75x = 842.84 × 331.00
  4. Step 4: Simplify right side
    610.75x = 278,976.57
  5. Step 5: Solve for x
    x = 278,976.57/610.75
  6. Step 6: Final answer
    x = 456.77

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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.