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Finding the Fourth Proportional to 331, 456.90 and 227.80

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Solution

The fourth proportional to 331, 456.90 and 227.80 is: 314.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    331 : 456.90 = 227.80 : x
  2. Step 2: Convert to fraction form
    331/456.90 = 227.80/x
  3. Step 3: Cross multiply
    331x = 456.90 × 227.80
  4. Step 4: Simplify right side
    331x = 104,081.82
  5. Step 5: Solve for x
    x = 104,081.82/331
  6. Step 6: Final answer
    x = 314.45

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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.