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Finding the Fourth Proportional to 278.88, 418.14 and 192.03

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Solution

The fourth proportional to 278.88, 418.14 and 192.03 is: 287.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.88 : 418.14 = 192.03 : x
  2. Step 2: Convert to fraction form
    278.88/418.14 = 192.03/x
  3. Step 3: Cross multiply
    278.88x = 418.14 × 192.03
  4. Step 4: Simplify right side
    278.88x = 80,295.42
  5. Step 5: Solve for x
    x = 80,295.42/278.88
  6. Step 6: Final answer
    x = 287.92

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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.