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Finding the Fourth Proportional to 411.32, 617.13 and 228.66

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Solution

The fourth proportional to 411.32, 617.13 and 228.66 is: 343.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.32 : 617.13 = 228.66 : x
  2. Step 2: Convert to fraction form
    411.32/617.13 = 228.66/x
  3. Step 3: Cross multiply
    411.32x = 617.13 × 228.66
  4. Step 4: Simplify right side
    411.32x = 141,112.95
  5. Step 5: Solve for x
    x = 141,112.95/411.32
  6. Step 6: Final answer
    x = 343.08

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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.