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Finding the Fourth Proportional to 286.23, 394.74 and 224.06

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Solution

The fourth proportional to 286.23, 394.74 and 224.06 is: 308.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.23 : 394.74 = 224.06 : x
  2. Step 2: Convert to fraction form
    286.23/394.74 = 224.06/x
  3. Step 3: Cross multiply
    286.23x = 394.74 × 224.06
  4. Step 4: Simplify right side
    286.23x = 88,443.47
  5. Step 5: Solve for x
    x = 88,443.47/286.23
  6. Step 6: Final answer
    x = 308.99

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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.