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Finding the Fourth Proportional to 288.83, 399.11 and 205.79

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Solution

The fourth proportional to 288.83, 399.11 and 205.79 is: 284.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.83 : 399.11 = 205.79 : x
  2. Step 2: Convert to fraction form
    288.83/399.11 = 205.79/x
  3. Step 3: Cross multiply
    288.83x = 399.11 × 205.79
  4. Step 4: Simplify right side
    288.83x = 82,132.79
  5. Step 5: Solve for x
    x = 82,132.79/288.83
  6. Step 6: Final answer
    x = 284.37

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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.