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Finding the Fourth Proportional to 209.84, 314.49 and 106.97

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Solution

The fourth proportional to 209.84, 314.49 and 106.97 is: 160.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.84 : 314.49 = 106.97 : x
  2. Step 2: Convert to fraction form
    209.84/314.49 = 106.97/x
  3. Step 3: Cross multiply
    209.84x = 314.49 × 106.97
  4. Step 4: Simplify right side
    209.84x = 33,639.42
  5. Step 5: Solve for x
    x = 33,639.42/209.84
  6. Step 6: Final answer
    x = 160.31

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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.