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Finding the Fourth Proportional to 394.81, 544.87 and 229.12

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Solution

The fourth proportional to 394.81, 544.87 and 229.12 is: 316.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.81 : 544.87 = 229.12 : x
  2. Step 2: Convert to fraction form
    394.81/544.87 = 229.12/x
  3. Step 3: Cross multiply
    394.81x = 544.87 × 229.12
  4. Step 4: Simplify right side
    394.81x = 124,842.06
  5. Step 5: Solve for x
    x = 124,842.06/394.81
  6. Step 6: Final answer
    x = 316.21

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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.