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Finding the Fourth Proportional to 278.42, 417.96 and 197.33

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Solution

The fourth proportional to 278.42, 417.96 and 197.33 is: 296.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.42 : 417.96 = 197.33 : x
  2. Step 2: Convert to fraction form
    278.42/417.96 = 197.33/x
  3. Step 3: Cross multiply
    278.42x = 417.96 × 197.33
  4. Step 4: Simplify right side
    278.42x = 82,473.96
  5. Step 5: Solve for x
    x = 82,473.96/278.42
  6. Step 6: Final answer
    x = 296.23

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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.