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Finding the Fourth Proportional to 300.87, 450.98 and 127.49

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Solution

The fourth proportional to 300.87, 450.98 and 127.49 is: 191.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.87 : 450.98 = 127.49 : x
  2. Step 2: Convert to fraction form
    300.87/450.98 = 127.49/x
  3. Step 3: Cross multiply
    300.87x = 450.98 × 127.49
  4. Step 4: Simplify right side
    300.87x = 57,495.44
  5. Step 5: Solve for x
    x = 57,495.44/300.87
  6. Step 6: Final answer
    x = 191.10

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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.