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Finding the Fourth Proportional to 478.25, 658.96 and 330.62

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Solution

The fourth proportional to 478.25, 658.96 and 330.62 is: 455.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.25 : 658.96 = 330.62 : x
  2. Step 2: Convert to fraction form
    478.25/658.96 = 330.62/x
  3. Step 3: Cross multiply
    478.25x = 658.96 × 330.62
  4. Step 4: Simplify right side
    478.25x = 217,866.18
  5. Step 5: Solve for x
    x = 217,866.18/478.25
  6. Step 6: Final answer
    x = 455.55

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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.