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Finding the Fourth Proportional to 208.89, 288.38 and 130.23

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Solution

The fourth proportional to 208.89, 288.38 and 130.23 is: 179.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.89 : 288.38 = 130.23 : x
  2. Step 2: Convert to fraction form
    208.89/288.38 = 130.23/x
  3. Step 3: Cross multiply
    208.89x = 288.38 × 130.23
  4. Step 4: Simplify right side
    208.89x = 37,556.05
  5. Step 5: Solve for x
    x = 37,556.05/208.89
  6. Step 6: Final answer
    x = 179.79

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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.