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Finding the Fourth Proportional to 346.73, 478.31 and 222.39

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Solution

The fourth proportional to 346.73, 478.31 and 222.39 is: 306.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.73 : 478.31 = 222.39 : x
  2. Step 2: Convert to fraction form
    346.73/478.31 = 222.39/x
  3. Step 3: Cross multiply
    346.73x = 478.31 × 222.39
  4. Step 4: Simplify right side
    346.73x = 106,370.25
  5. Step 5: Solve for x
    x = 106,370.25/346.73
  6. Step 6: Final answer
    x = 306.79

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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.