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Finding the Fourth Proportional to 378.99, 568.34 and 132.12

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Solution

The fourth proportional to 378.99, 568.34 and 132.12 is: 198.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.99 : 568.34 = 132.12 : x
  2. Step 2: Convert to fraction form
    378.99/568.34 = 132.12/x
  3. Step 3: Cross multiply
    378.99x = 568.34 × 132.12
  4. Step 4: Simplify right side
    378.99x = 75,089.08
  5. Step 5: Solve for x
    x = 75,089.08/378.99
  6. Step 6: Final answer
    x = 198.13

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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.