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Finding the Fourth Proportional to 252.53, 377.87 and 208.79

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Solution

The fourth proportional to 252.53, 377.87 and 208.79 is: 312.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.53 : 377.87 = 208.79 : x
  2. Step 2: Convert to fraction form
    252.53/377.87 = 208.79/x
  3. Step 3: Cross multiply
    252.53x = 377.87 × 208.79
  4. Step 4: Simplify right side
    252.53x = 78,894.11
  5. Step 5: Solve for x
    x = 78,894.11/252.53
  6. Step 6: Final answer
    x = 312.42

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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.