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Finding the Fourth Proportional to 279.81, 383.91 and 272.91

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Solution

The fourth proportional to 279.81, 383.91 and 272.91 is: 374.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.81 : 383.91 = 272.91 : x
  2. Step 2: Convert to fraction form
    279.81/383.91 = 272.91/x
  3. Step 3: Cross multiply
    279.81x = 383.91 × 272.91
  4. Step 4: Simplify right side
    279.81x = 104,772.88
  5. Step 5: Solve for x
    x = 104,772.88/279.81
  6. Step 6: Final answer
    x = 374.44

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.