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Finding the Fourth Proportional to 209.67, 314.70 and 164.51

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Solution

The fourth proportional to 209.67, 314.70 and 164.51 is: 246.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.67 : 314.70 = 164.51 : x
  2. Step 2: Convert to fraction form
    209.67/314.70 = 164.51/x
  3. Step 3: Cross multiply
    209.67x = 314.70 × 164.51
  4. Step 4: Simplify right side
    209.67x = 51,771.30
  5. Step 5: Solve for x
    x = 51,771.30/209.67
  6. Step 6: Final answer
    x = 246.92

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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.