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Finding the Fourth Proportional to 279.74, 419.38 and 219.14

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Solution

The fourth proportional to 279.74, 419.38 and 219.14 is: 328.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.74 : 419.38 = 219.14 : x
  2. Step 2: Convert to fraction form
    279.74/419.38 = 219.14/x
  3. Step 3: Cross multiply
    279.74x = 419.38 × 219.14
  4. Step 4: Simplify right side
    279.74x = 91,901.86
  5. Step 5: Solve for x
    x = 91,901.86/279.74
  6. Step 6: Final answer
    x = 328.53

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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.