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Finding the Fourth Proportional to 278.19, 417.83 and 226.87

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Solution

The fourth proportional to 278.19, 417.83 and 226.87 is: 340.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.19 : 417.83 = 226.87 : x
  2. Step 2: Convert to fraction form
    278.19/417.83 = 226.87/x
  3. Step 3: Cross multiply
    278.19x = 417.83 × 226.87
  4. Step 4: Simplify right side
    278.19x = 94,793.09
  5. Step 5: Solve for x
    x = 94,793.09/278.19
  6. Step 6: Final answer
    x = 340.75

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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.