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Finding the Fourth Proportional to 209.36, 288.44 and 162.57

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Solution

The fourth proportional to 209.36, 288.44 and 162.57 is: 223.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.36 : 288.44 = 162.57 : x
  2. Step 2: Convert to fraction form
    209.36/288.44 = 162.57/x
  3. Step 3: Cross multiply
    209.36x = 288.44 × 162.57
  4. Step 4: Simplify right side
    209.36x = 46,891.69
  5. Step 5: Solve for x
    x = 46,891.69/209.36
  6. Step 6: Final answer
    x = 223.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.