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Finding the Fourth Proportional to 279, 418.50 and 245.19

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Solution

The fourth proportional to 279, 418.50 and 245.19 is: 367.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    279 : 418.50 = 245.19 : x
  2. Step 2: Convert to fraction form
    279/418.50 = 245.19/x
  3. Step 3: Cross multiply
    279x = 418.50 × 245.19
  4. Step 4: Simplify right side
    279x = 102,612.02
  5. Step 5: Solve for x
    x = 102,612.02/279
  6. Step 6: Final answer
    x = 367.79

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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.