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Finding the Fourth Proportional to 641.98, 963.56 and 277.03

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Solution

The fourth proportional to 641.98, 963.56 and 277.03 is: 415.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.98 : 963.56 = 277.03 : x
  2. Step 2: Convert to fraction form
    641.98/963.56 = 277.03/x
  3. Step 3: Cross multiply
    641.98x = 963.56 × 277.03
  4. Step 4: Simplify right side
    641.98x = 266,936.92
  5. Step 5: Solve for x
    x = 266,936.92/641.98
  6. Step 6: Final answer
    x = 415.80

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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.