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Finding the Fourth Proportional to 299.21, 448.80 and 106.70

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Solution

The fourth proportional to 299.21, 448.80 and 106.70 is: 160.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.21 : 448.80 = 106.70 : x
  2. Step 2: Convert to fraction form
    299.21/448.80 = 106.70/x
  3. Step 3: Cross multiply
    299.21x = 448.80 × 106.70
  4. Step 4: Simplify right side
    299.21x = 47,884.72
  5. Step 5: Solve for x
    x = 47,884.72/299.21
  6. Step 6: Final answer
    x = 160.04

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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.