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Finding the Fourth Proportional to 243.27, 364.41 and 212.09

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Solution

The fourth proportional to 243.27, 364.41 and 212.09 is: 317.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.27 : 364.41 = 212.09 : x
  2. Step 2: Convert to fraction form
    243.27/364.41 = 212.09/x
  3. Step 3: Cross multiply
    243.27x = 364.41 × 212.09
  4. Step 4: Simplify right side
    243.27x = 77,285.89
  5. Step 5: Solve for x
    x = 77,285.89/243.27
  6. Step 6: Final answer
    x = 317.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.