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Finding the Fourth Proportional to 486.83, 671.05 and 329.42

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Solution

The fourth proportional to 486.83, 671.05 and 329.42 is: 454.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.83 : 671.05 = 329.42 : x
  2. Step 2: Convert to fraction form
    486.83/671.05 = 329.42/x
  3. Step 3: Cross multiply
    486.83x = 671.05 × 329.42
  4. Step 4: Simplify right side
    486.83x = 221,057.29
  5. Step 5: Solve for x
    x = 221,057.29/486.83
  6. Step 6: Final answer
    x = 454.07

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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.