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Finding the Fourth Proportional to 278.20, 416.08 and 227.17

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Solution

The fourth proportional to 278.20, 416.08 and 227.17 is: 339.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.20 : 416.08 = 227.17 : x
  2. Step 2: Convert to fraction form
    278.20/416.08 = 227.17/x
  3. Step 3: Cross multiply
    278.20x = 416.08 × 227.17
  4. Step 4: Simplify right side
    278.20x = 94,520.89
  5. Step 5: Solve for x
    x = 94,520.89/278.20
  6. Step 6: Final answer
    x = 339.76

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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.