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Finding the Fourth Proportional to 279.62, 419.07 and 272.45

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Solution

The fourth proportional to 279.62, 419.07 and 272.45 is: 408.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.62 : 419.07 = 272.45 : x
  2. Step 2: Convert to fraction form
    279.62/419.07 = 272.45/x
  3. Step 3: Cross multiply
    279.62x = 419.07 × 272.45
  4. Step 4: Simplify right side
    279.62x = 114,175.62
  5. Step 5: Solve for x
    x = 114,175.62/279.62
  6. Step 6: Final answer
    x = 408.32

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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.