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Finding the Fourth Proportional to 280.66, 418.20 and 249.99

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Solution

The fourth proportional to 280.66, 418.20 and 249.99 is: 372.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.66 : 418.20 = 249.99 : x
  2. Step 2: Convert to fraction form
    280.66/418.20 = 249.99/x
  3. Step 3: Cross multiply
    280.66x = 418.20 × 249.99
  4. Step 4: Simplify right side
    280.66x = 104,542.48
  5. Step 5: Solve for x
    x = 104,542.48/280.66
  6. Step 6: Final answer
    x = 372.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.