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Finding the Fourth Proportional to 279.63, 385.73 and 200.91

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Solution

The fourth proportional to 279.63, 385.73 and 200.91 is: 277.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.63 : 385.73 = 200.91 : x
  2. Step 2: Convert to fraction form
    279.63/385.73 = 200.91/x
  3. Step 3: Cross multiply
    279.63x = 385.73 × 200.91
  4. Step 4: Simplify right side
    279.63x = 77,496.01
  5. Step 5: Solve for x
    x = 77,496.01/279.63
  6. Step 6: Final answer
    x = 277.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.