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Finding the Fourth Proportional to 379.99, 570.06 and 133.22

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Solution

The fourth proportional to 379.99, 570.06 and 133.22 is: 199.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.99 : 570.06 = 133.22 : x
  2. Step 2: Convert to fraction form
    379.99/570.06 = 133.22/x
  3. Step 3: Cross multiply
    379.99x = 570.06 × 133.22
  4. Step 4: Simplify right side
    379.99x = 75,939.88
  5. Step 5: Solve for x
    x = 75,939.88/379.99
  6. Step 6: Final answer
    x = 199.85

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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.