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Finding the Fourth Proportional to 209.18, 313.77 and 182.15

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Solution

The fourth proportional to 209.18, 313.77 and 182.15 is: 273.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.18 : 313.77 = 182.15 : x
  2. Step 2: Convert to fraction form
    209.18/313.77 = 182.15/x
  3. Step 3: Cross multiply
    209.18x = 313.77 × 182.15
  4. Step 4: Simplify right side
    209.18x = 57,153.50
  5. Step 5: Solve for x
    x = 57,153.50/209.18
  6. Step 6: Final answer
    x = 273.22

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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.