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Finding the Fourth Proportional to 209.95, 315.23 and 174.11

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Solution

The fourth proportional to 209.95, 315.23 and 174.11 is: 261.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.95 : 315.23 = 174.11 : x
  2. Step 2: Convert to fraction form
    209.95/315.23 = 174.11/x
  3. Step 3: Cross multiply
    209.95x = 315.23 × 174.11
  4. Step 4: Simplify right side
    209.95x = 54,882.25
  5. Step 5: Solve for x
    x = 54,882.25/209.95
  6. Step 6: Final answer
    x = 261.41

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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.