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Finding the Fourth Proportional to 278.43, 416.86 and 226.06

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Solution

The fourth proportional to 278.43, 416.86 and 226.06 is: 338.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.43 : 416.86 = 226.06 : x
  2. Step 2: Convert to fraction form
    278.43/416.86 = 226.06/x
  3. Step 3: Cross multiply
    278.43x = 416.86 × 226.06
  4. Step 4: Simplify right side
    278.43x = 94,235.04
  5. Step 5: Solve for x
    x = 94,235.04/278.43
  6. Step 6: Final answer
    x = 338.46

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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.