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Finding the Fourth Proportional to 223.69, 335.57 and 79.38

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Solution

The fourth proportional to 223.69, 335.57 and 79.38 is: 119.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.69 : 335.57 = 79.38 : x
  2. Step 2: Convert to fraction form
    223.69/335.57 = 79.38/x
  3. Step 3: Cross multiply
    223.69x = 335.57 × 79.38
  4. Step 4: Simplify right side
    223.69x = 26,637.55
  5. Step 5: Solve for x
    x = 26,637.55/223.69
  6. Step 6: Final answer
    x = 119.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.