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Finding the Fourth Proportional to 480.63, 663.15 and 331.38

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Solution

The fourth proportional to 480.63, 663.15 and 331.38 is: 457.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.63 : 663.15 = 331.38 : x
  2. Step 2: Convert to fraction form
    480.63/663.15 = 331.38/x
  3. Step 3: Cross multiply
    480.63x = 663.15 × 331.38
  4. Step 4: Simplify right side
    480.63x = 219,754.65
  5. Step 5: Solve for x
    x = 219,754.65/480.63
  6. Step 6: Final answer
    x = 457.22

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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.