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Finding the Fourth Proportional to 427.97, 641.66 and 154.05

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Solution

The fourth proportional to 427.97, 641.66 and 154.05 is: 230.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.97 : 641.66 = 154.05 : x
  2. Step 2: Convert to fraction form
    427.97/641.66 = 154.05/x
  3. Step 3: Cross multiply
    427.97x = 641.66 × 154.05
  4. Step 4: Simplify right side
    427.97x = 98,846.95
  5. Step 5: Solve for x
    x = 98,846.95/427.97
  6. Step 6: Final answer
    x = 230.97

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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.