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Finding the Fourth Proportional to 209.39, 314.08 and 173.54

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Solution

The fourth proportional to 209.39, 314.08 and 173.54 is: 260.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.39 : 314.08 = 173.54 : x
  2. Step 2: Convert to fraction form
    209.39/314.08 = 173.54/x
  3. Step 3: Cross multiply
    209.39x = 314.08 × 173.54
  4. Step 4: Simplify right side
    209.39x = 54,505.79
  5. Step 5: Solve for x
    x = 54,505.79/209.39
  6. Step 6: Final answer
    x = 260.31

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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.