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Finding the Fourth Proportional to 304.99, 421.06 and 194.56

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Solution

The fourth proportional to 304.99, 421.06 and 194.56 is: 268.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.99 : 421.06 = 194.56 : x
  2. Step 2: Convert to fraction form
    304.99/421.06 = 194.56/x
  3. Step 3: Cross multiply
    304.99x = 421.06 × 194.56
  4. Step 4: Simplify right side
    304.99x = 81,919.33
  5. Step 5: Solve for x
    x = 81,919.33/304.99
  6. Step 6: Final answer
    x = 268.60

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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.