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Finding the Fourth Proportional to 394.39, 544.25 and 228.59

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Solution

The fourth proportional to 394.39, 544.25 and 228.59 is: 315.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.39 : 544.25 = 228.59 : x
  2. Step 2: Convert to fraction form
    394.39/544.25 = 228.59/x
  3. Step 3: Cross multiply
    394.39x = 544.25 × 228.59
  4. Step 4: Simplify right side
    394.39x = 124,406.24
  5. Step 5: Solve for x
    x = 124,406.24/394.39
  6. Step 6: Final answer
    x = 315.44

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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.