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Finding the Fourth Proportional to 324.84, 486.36 and 194.88

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Solution

The fourth proportional to 324.84, 486.36 and 194.88 is: 291.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.84 : 486.36 = 194.88 : x
  2. Step 2: Convert to fraction form
    324.84/486.36 = 194.88/x
  3. Step 3: Cross multiply
    324.84x = 486.36 × 194.88
  4. Step 4: Simplify right side
    324.84x = 94,781.84
  5. Step 5: Solve for x
    x = 94,781.84/324.84
  6. Step 6: Final answer
    x = 291.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.