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Finding the Fourth Proportional to 209.47, 288.93 and 165.73

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Solution

The fourth proportional to 209.47, 288.93 and 165.73 is: 228.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.47 : 288.93 = 165.73 : x
  2. Step 2: Convert to fraction form
    209.47/288.93 = 165.73/x
  3. Step 3: Cross multiply
    209.47x = 288.93 × 165.73
  4. Step 4: Simplify right side
    209.47x = 47,884.37
  5. Step 5: Solve for x
    x = 47,884.37/209.47
  6. Step 6: Final answer
    x = 228.60

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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.