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Finding the Fourth Proportional to 331.56, 500.28 and 318.24

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Solution

The fourth proportional to 331.56, 500.28 and 318.24 is: 480.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.56 : 500.28 = 318.24 : x
  2. Step 2: Convert to fraction form
    331.56/500.28 = 318.24/x
  3. Step 3: Cross multiply
    331.56x = 500.28 × 318.24
  4. Step 4: Simplify right side
    331.56x = 159,209.11
  5. Step 5: Solve for x
    x = 159,209.11/331.56
  6. Step 6: Final answer
    x = 480.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.