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Finding the Fourth Proportional to 252.15, 377.91 and 211.47

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Solution

The fourth proportional to 252.15, 377.91 and 211.47 is: 316.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.15 : 377.91 = 211.47 : x
  2. Step 2: Convert to fraction form
    252.15/377.91 = 211.47/x
  3. Step 3: Cross multiply
    252.15x = 377.91 × 211.47
  4. Step 4: Simplify right side
    252.15x = 79,916.63
  5. Step 5: Solve for x
    x = 79,916.63/252.15
  6. Step 6: Final answer
    x = 316.94

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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.