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Finding the Fourth Proportional to 274.35, 411.38 and 228.72

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Solution

The fourth proportional to 274.35, 411.38 and 228.72 is: 342.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.35 : 411.38 = 228.72 : x
  2. Step 2: Convert to fraction form
    274.35/411.38 = 228.72/x
  3. Step 3: Cross multiply
    274.35x = 411.38 × 228.72
  4. Step 4: Simplify right side
    274.35x = 94,089.86
  5. Step 5: Solve for x
    x = 94,089.86/274.35
  6. Step 6: Final answer
    x = 342.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.