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Finding the Fourth Proportional to 299.12, 448.50 and 145.10

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Solution

The fourth proportional to 299.12, 448.50 and 145.10 is: 217.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.12 : 448.50 = 145.10 : x
  2. Step 2: Convert to fraction form
    299.12/448.50 = 145.10/x
  3. Step 3: Cross multiply
    299.12x = 448.50 × 145.10
  4. Step 4: Simplify right side
    299.12x = 65,077.35
  5. Step 5: Solve for x
    x = 65,077.35/299.12
  6. Step 6: Final answer
    x = 217.56

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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.