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Finding the Fourth Proportional to 219.09, 301.55 and 189.93

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Solution

The fourth proportional to 219.09, 301.55 and 189.93 is: 261.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.09 : 301.55 = 189.93 : x
  2. Step 2: Convert to fraction form
    219.09/301.55 = 189.93/x
  3. Step 3: Cross multiply
    219.09x = 301.55 × 189.93
  4. Step 4: Simplify right side
    219.09x = 57,273.39
  5. Step 5: Solve for x
    x = 57,273.39/219.09
  6. Step 6: Final answer
    x = 261.41

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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.