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Finding the Fourth Proportional to 641.58, 962.28 and 179.40

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Solution

The fourth proportional to 641.58, 962.28 and 179.40 is: 269.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.58 : 962.28 = 179.40 : x
  2. Step 2: Convert to fraction form
    641.58/962.28 = 179.40/x
  3. Step 3: Cross multiply
    641.58x = 962.28 × 179.40
  4. Step 4: Simplify right side
    641.58x = 172,633.03
  5. Step 5: Solve for x
    x = 172,633.03/641.58
  6. Step 6: Final answer
    x = 269.07

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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.