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Finding the Fourth Proportional to 308.13, 425.07 and 191.67

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Solution

The fourth proportional to 308.13, 425.07 and 191.67 is: 264.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.13 : 425.07 = 191.67 : x
  2. Step 2: Convert to fraction form
    308.13/425.07 = 191.67/x
  3. Step 3: Cross multiply
    308.13x = 425.07 × 191.67
  4. Step 4: Simplify right side
    308.13x = 81,473.17
  5. Step 5: Solve for x
    x = 81,473.17/308.13
  6. Step 6: Final answer
    x = 264.41

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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.