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Finding the Fourth Proportional to 205.00, 307.19 and 189.81

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Solution

The fourth proportional to 205.00, 307.19 and 189.81 is: 284.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.00 : 307.19 = 189.81 : x
  2. Step 2: Convert to fraction form
    205.00/307.19 = 189.81/x
  3. Step 3: Cross multiply
    205.00x = 307.19 × 189.81
  4. Step 4: Simplify right side
    205.00x = 58,308.21
  5. Step 5: Solve for x
    x = 58,308.21/205.00
  6. Step 6: Final answer
    x = 284.43

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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.