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Finding the Fourth Proportional to 301.49, 451.88 and 128.04

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Solution

The fourth proportional to 301.49, 451.88 and 128.04 is: 191.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.49 : 451.88 = 128.04 : x
  2. Step 2: Convert to fraction form
    301.49/451.88 = 128.04/x
  3. Step 3: Cross multiply
    301.49x = 451.88 × 128.04
  4. Step 4: Simplify right side
    301.49x = 57,858.08
  5. Step 5: Solve for x
    x = 57,858.08/301.49
  6. Step 6: Final answer
    x = 191.91

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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.