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Finding the Fourth Proportional to 278.08, 416.48 and 133.52

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Solution

The fourth proportional to 278.08, 416.48 and 133.52 is: 199.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.08 : 416.48 = 133.52 : x
  2. Step 2: Convert to fraction form
    278.08/416.48 = 133.52/x
  3. Step 3: Cross multiply
    278.08x = 416.48 × 133.52
  4. Step 4: Simplify right side
    278.08x = 55,608.41
  5. Step 5: Solve for x
    x = 55,608.41/278.08
  6. Step 6: Final answer
    x = 199.97

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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.