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Finding the Fourth Proportional to 329.82, 454.86 and 231.40

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Solution

The fourth proportional to 329.82, 454.86 and 231.40 is: 319.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.82 : 454.86 = 231.40 : x
  2. Step 2: Convert to fraction form
    329.82/454.86 = 231.40/x
  3. Step 3: Cross multiply
    329.82x = 454.86 × 231.40
  4. Step 4: Simplify right side
    329.82x = 105,254.60
  5. Step 5: Solve for x
    x = 105,254.60/329.82
  6. Step 6: Final answer
    x = 319.13

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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.