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Finding the Fourth Proportional to 308.98, 425.94 and 190.87

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Solution

The fourth proportional to 308.98, 425.94 and 190.87 is: 263.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.98 : 425.94 = 190.87 : x
  2. Step 2: Convert to fraction form
    308.98/425.94 = 190.87/x
  3. Step 3: Cross multiply
    308.98x = 425.94 × 190.87
  4. Step 4: Simplify right side
    308.98x = 81,299.64
  5. Step 5: Solve for x
    x = 81,299.64/308.98
  6. Step 6: Final answer
    x = 263.13

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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.