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Finding the Fourth Proportional to 322, 444.15 and 211.57

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Solution

The fourth proportional to 322, 444.15 and 211.57 is: 291.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    322 : 444.15 = 211.57 : x
  2. Step 2: Convert to fraction form
    322/444.15 = 211.57/x
  3. Step 3: Cross multiply
    322x = 444.15 × 211.57
  4. Step 4: Simplify right side
    322x = 93,968.82
  5. Step 5: Solve for x
    x = 93,968.82/322
  6. Step 6: Final answer
    x = 291.83

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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.