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Finding the Fourth Proportional to 327.80, 452.40 and 211.36

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Solution

The fourth proportional to 327.80, 452.40 and 211.36 is: 291.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.80 : 452.40 = 211.36 : x
  2. Step 2: Convert to fraction form
    327.80/452.40 = 211.36/x
  3. Step 3: Cross multiply
    327.80x = 452.40 × 211.36
  4. Step 4: Simplify right side
    327.80x = 95,619.26
  5. Step 5: Solve for x
    x = 95,619.26/327.80
  6. Step 6: Final answer
    x = 291.70

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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.