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Finding the Fourth Proportional to 205.99, 308.92 and 69.01

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Solution

The fourth proportional to 205.99, 308.92 and 69.01 is: 103.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.99 : 308.92 = 69.01 : x
  2. Step 2: Convert to fraction form
    205.99/308.92 = 69.01/x
  3. Step 3: Cross multiply
    205.99x = 308.92 × 69.01
  4. Step 4: Simplify right side
    205.99x = 21,317.20
  5. Step 5: Solve for x
    x = 21,317.20/205.99
  6. Step 6: Final answer
    x = 103.49

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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.