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Finding the Fourth Proportional to 394.15, 544 and 228.34

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Solution

The fourth proportional to 394.15, 544 and 228.34 is: 315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.15 : 544 = 228.34 : x
  2. Step 2: Convert to fraction form
    394.15/544 = 228.34/x
  3. Step 3: Cross multiply
    394.15x = 544 × 228.34
  4. Step 4: Simplify right side
    394.15x = 124,216.96
  5. Step 5: Solve for x
    x = 124,216.96/394.15
  6. Step 6: Final answer
    x = 315.15

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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.