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Finding the Fourth Proportional to 209.37, 315.26 and 173.16

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Solution

The fourth proportional to 209.37, 315.26 and 173.16 is: 260.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.37 : 315.26 = 173.16 : x
  2. Step 2: Convert to fraction form
    209.37/315.26 = 173.16/x
  3. Step 3: Cross multiply
    209.37x = 315.26 × 173.16
  4. Step 4: Simplify right side
    209.37x = 54,590.42
  5. Step 5: Solve for x
    x = 54,590.42/209.37
  6. Step 6: Final answer
    x = 260.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.