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Finding the Fourth Proportional to 394.08, 543.86 and 228.35

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Solution

The fourth proportional to 394.08, 543.86 and 228.35 is: 315.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.08 : 543.86 = 228.35 : x
  2. Step 2: Convert to fraction form
    394.08/543.86 = 228.35/x
  3. Step 3: Cross multiply
    394.08x = 543.86 × 228.35
  4. Step 4: Simplify right side
    394.08x = 124,186.57
  5. Step 5: Solve for x
    x = 124,186.57/394.08
  6. Step 6: Final answer
    x = 315.13

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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.