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Finding the Fourth Proportional to 427.79, 641.67 and 180.92

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Solution

The fourth proportional to 427.79, 641.67 and 180.92 is: 271.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.79 : 641.67 = 180.92 : x
  2. Step 2: Convert to fraction form
    427.79/641.67 = 180.92/x
  3. Step 3: Cross multiply
    427.79x = 641.67 × 180.92
  4. Step 4: Simplify right side
    427.79x = 116,090.94
  5. Step 5: Solve for x
    x = 116,090.94/427.79
  6. Step 6: Final answer
    x = 271.37

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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.