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Finding the Fourth Proportional to 314.93, 434.59 and 198.38

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Solution

The fourth proportional to 314.93, 434.59 and 198.38 is: 273.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.93 : 434.59 = 198.38 : x
  2. Step 2: Convert to fraction form
    314.93/434.59 = 198.38/x
  3. Step 3: Cross multiply
    314.93x = 434.59 × 198.38
  4. Step 4: Simplify right side
    314.93x = 86,211.30
  5. Step 5: Solve for x
    x = 86,211.30/314.93
  6. Step 6: Final answer
    x = 273.75

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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.