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Finding the Fourth Proportional to 300.74, 450.69 and 270.77

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Solution

The fourth proportional to 300.74, 450.69 and 270.77 is: 405.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.74 : 450.69 = 270.77 : x
  2. Step 2: Convert to fraction form
    300.74/450.69 = 270.77/x
  3. Step 3: Cross multiply
    300.74x = 450.69 × 270.77
  4. Step 4: Simplify right side
    300.74x = 122,031.08
  5. Step 5: Solve for x
    x = 122,031.08/300.74
  6. Step 6: Final answer
    x = 405.78

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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.