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Finding the Fourth Proportional to 394.41, 544.31 and 228.63

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Solution

The fourth proportional to 394.41, 544.31 and 228.63 is: 315.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.41 : 544.31 = 228.63 : x
  2. Step 2: Convert to fraction form
    394.41/544.31 = 228.63/x
  3. Step 3: Cross multiply
    394.41x = 544.31 × 228.63
  4. Step 4: Simplify right side
    394.41x = 124,445.60
  5. Step 5: Solve for x
    x = 124,445.60/394.41
  6. Step 6: Final answer
    x = 315.52

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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.