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Finding the Fourth Proportional to 253.49, 349.83 and 191.21

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Solution

The fourth proportional to 253.49, 349.83 and 191.21 is: 263.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.49 : 349.83 = 191.21 : x
  2. Step 2: Convert to fraction form
    253.49/349.83 = 191.21/x
  3. Step 3: Cross multiply
    253.49x = 349.83 × 191.21
  4. Step 4: Simplify right side
    253.49x = 66,889.25
  5. Step 5: Solve for x
    x = 66,889.25/253.49
  6. Step 6: Final answer
    x = 263.88

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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.