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Finding the Fourth Proportional to 257.11, 354.84 and 194.83

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Solution

The fourth proportional to 257.11, 354.84 and 194.83 is: 268.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.11 : 354.84 = 194.83 : x
  2. Step 2: Convert to fraction form
    257.11/354.84 = 194.83/x
  3. Step 3: Cross multiply
    257.11x = 354.84 × 194.83
  4. Step 4: Simplify right side
    257.11x = 69,133.48
  5. Step 5: Solve for x
    x = 69,133.48/257.11
  6. Step 6: Final answer
    x = 268.89

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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.