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Finding the Fourth Proportional to 299.70, 448.47 and 208.02

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Solution

The fourth proportional to 299.70, 448.47 and 208.02 is: 311.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.70 : 448.47 = 208.02 : x
  2. Step 2: Convert to fraction form
    299.70/448.47 = 208.02/x
  3. Step 3: Cross multiply
    299.70x = 448.47 × 208.02
  4. Step 4: Simplify right side
    299.70x = 93,290.73
  5. Step 5: Solve for x
    x = 93,290.73/299.70
  6. Step 6: Final answer
    x = 311.28

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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.