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Finding the Fourth Proportional to 641.34, 962.21 and 276.14

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Solution

The fourth proportional to 641.34, 962.21 and 276.14 is: 414.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.34 : 962.21 = 276.14 : x
  2. Step 2: Convert to fraction form
    641.34/962.21 = 276.14/x
  3. Step 3: Cross multiply
    641.34x = 962.21 × 276.14
  4. Step 4: Simplify right side
    641.34x = 265,707.77
  5. Step 5: Solve for x
    x = 265,707.77/641.34
  6. Step 6: Final answer
    x = 414.30

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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.