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Finding the Fourth Proportional to 279.25, 419.19 and 221.84

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Solution

The fourth proportional to 279.25, 419.19 and 221.84 is: 333.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.25 : 419.19 = 221.84 : x
  2. Step 2: Convert to fraction form
    279.25/419.19 = 221.84/x
  3. Step 3: Cross multiply
    279.25x = 419.19 × 221.84
  4. Step 4: Simplify right side
    279.25x = 92,994.11
  5. Step 5: Solve for x
    x = 92,994.11/279.25
  6. Step 6: Final answer
    x = 333.01

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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.