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Finding the Fourth Proportional to 314.90, 434.41 and 231.83

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Solution

The fourth proportional to 314.90, 434.41 and 231.83 is: 319.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.90 : 434.41 = 231.83 : x
  2. Step 2: Convert to fraction form
    314.90/434.41 = 231.83/x
  3. Step 3: Cross multiply
    314.90x = 434.41 × 231.83
  4. Step 4: Simplify right side
    314.90x = 100,709.45
  5. Step 5: Solve for x
    x = 100,709.45/314.90
  6. Step 6: Final answer
    x = 319.81

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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.