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Finding the Fourth Proportional to 641.92, 962.98 and 271.84

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Solution

The fourth proportional to 641.92, 962.98 and 271.84 is: 407.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.92 : 962.98 = 271.84 : x
  2. Step 2: Convert to fraction form
    641.92/962.98 = 271.84/x
  3. Step 3: Cross multiply
    641.92x = 962.98 × 271.84
  4. Step 4: Simplify right side
    641.92x = 261,776.48
  5. Step 5: Solve for x
    x = 261,776.48/641.92
  6. Step 6: Final answer
    x = 407.80

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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.