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Finding the Fourth Proportional to 641.51, 962.21 and 179.30

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Solution

The fourth proportional to 641.51, 962.21 and 179.30 is: 268.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.51 : 962.21 = 179.30 : x
  2. Step 2: Convert to fraction form
    641.51/962.21 = 179.30/x
  3. Step 3: Cross multiply
    641.51x = 962.21 × 179.30
  4. Step 4: Simplify right side
    641.51x = 172,520.69
  5. Step 5: Solve for x
    x = 172,520.69/641.51
  6. Step 6: Final answer
    x = 268.93

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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.