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Finding the Fourth Proportional to 299, 448.38 and 144.80

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Solution

The fourth proportional to 299, 448.38 and 144.80 is: 217.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    299 : 448.38 = 144.80 : x
  2. Step 2: Convert to fraction form
    299/448.38 = 144.80/x
  3. Step 3: Cross multiply
    299x = 448.38 × 144.80
  4. Step 4: Simplify right side
    299x = 64,925.42
  5. Step 5: Solve for x
    x = 64,925.42/299
  6. Step 6: Final answer
    x = 217.14

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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.