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Finding the Fourth Proportional to 279.78, 421.35 and 244.14

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Solution

The fourth proportional to 279.78, 421.35 and 244.14 is: 367.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.78 : 421.35 = 244.14 : x
  2. Step 2: Convert to fraction form
    279.78/421.35 = 244.14/x
  3. Step 3: Cross multiply
    279.78x = 421.35 × 244.14
  4. Step 4: Simplify right side
    279.78x = 102,868.39
  5. Step 5: Solve for x
    x = 102,868.39/279.78
  6. Step 6: Final answer
    x = 367.68

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.