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Finding the Fourth Proportional to 209.00, 288.69 and 160.47

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Solution

The fourth proportional to 209.00, 288.69 and 160.47 is: 221.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.00 : 288.69 = 160.47 : x
  2. Step 2: Convert to fraction form
    209.00/288.69 = 160.47/x
  3. Step 3: Cross multiply
    209.00x = 288.69 × 160.47
  4. Step 4: Simplify right side
    209.00x = 46,326.75
  5. Step 5: Solve for x
    x = 46,326.75/209.00
  6. Step 6: Final answer
    x = 221.66

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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.