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Finding the Fourth Proportional to 286.91, 431.31 and 233.18

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Solution

The fourth proportional to 286.91, 431.31 and 233.18 is: 350.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.91 : 431.31 = 233.18 : x
  2. Step 2: Convert to fraction form
    286.91/431.31 = 233.18/x
  3. Step 3: Cross multiply
    286.91x = 431.31 × 233.18
  4. Step 4: Simplify right side
    286.91x = 100,570.71
  5. Step 5: Solve for x
    x = 100,570.71/286.91
  6. Step 6: Final answer
    x = 350.54

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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.