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Finding the Fourth Proportional to 300.98, 451.40 and 127.64

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Solution

The fourth proportional to 300.98, 451.40 and 127.64 is: 191.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.98 : 451.40 = 127.64 : x
  2. Step 2: Convert to fraction form
    300.98/451.40 = 127.64/x
  3. Step 3: Cross multiply
    300.98x = 451.40 × 127.64
  4. Step 4: Simplify right side
    300.98x = 57,617.19
  5. Step 5: Solve for x
    x = 57,617.19/300.98
  6. Step 6: Final answer
    x = 191.43

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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.