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Finding the Fourth Proportional to 307.97, 425.04 and 189.92

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Solution

The fourth proportional to 307.97, 425.04 and 189.92 is: 262.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.97 : 425.04 = 189.92 : x
  2. Step 2: Convert to fraction form
    307.97/425.04 = 189.92/x
  3. Step 3: Cross multiply
    307.97x = 425.04 × 189.92
  4. Step 4: Simplify right side
    307.97x = 80,721.47
  5. Step 5: Solve for x
    x = 80,721.47/307.97
  6. Step 6: Final answer
    x = 262.11

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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.