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Finding the Fourth Proportional to 300.15, 449.82 and 145.77

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Solution

The fourth proportional to 300.15, 449.82 and 145.77 is: 218.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.15 : 449.82 = 145.77 : x
  2. Step 2: Convert to fraction form
    300.15/449.82 = 145.77/x
  3. Step 3: Cross multiply
    300.15x = 449.82 × 145.77
  4. Step 4: Simplify right side
    300.15x = 65,569.53
  5. Step 5: Solve for x
    x = 65,569.53/300.15
  6. Step 6: Final answer
    x = 218.46

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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.