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Finding the Fourth Proportional to 314.75, 434.36 and 198.52

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Solution

The fourth proportional to 314.75, 434.36 and 198.52 is: 273.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.75 : 434.36 = 198.52 : x
  2. Step 2: Convert to fraction form
    314.75/434.36 = 198.52/x
  3. Step 3: Cross multiply
    314.75x = 434.36 × 198.52
  4. Step 4: Simplify right side
    314.75x = 86,229.15
  5. Step 5: Solve for x
    x = 86,229.15/314.75
  6. Step 6: Final answer
    x = 273.96

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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.