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Finding the Fourth Proportional to 641.15, 961.72 and 504.92

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Solution

The fourth proportional to 641.15, 961.72 and 504.92 is: 757.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.15 : 961.72 = 504.92 : x
  2. Step 2: Convert to fraction form
    641.15/961.72 = 504.92/x
  3. Step 3: Cross multiply
    641.15x = 961.72 × 504.92
  4. Step 4: Simplify right side
    641.15x = 485,590.23
  5. Step 5: Solve for x
    x = 485,590.23/641.15
  6. Step 6: Final answer
    x = 757.38

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Double scale
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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.