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Finding the Fourth Proportional to 243.15, 336.20 and 212.41

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Solution

The fourth proportional to 243.15, 336.20 and 212.41 is: 293.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.15 : 336.20 = 212.41 : x
  2. Step 2: Convert to fraction form
    243.15/336.20 = 212.41/x
  3. Step 3: Cross multiply
    243.15x = 336.20 × 212.41
  4. Step 4: Simplify right side
    243.15x = 71,410.34
  5. Step 5: Solve for x
    x = 71,410.34/243.15
  6. Step 6: Final answer
    x = 293.69

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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.