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Finding the Fourth Proportional to 641.50, 961.63 and 504.21

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Solution

The fourth proportional to 641.50, 961.63 and 504.21 is: 755.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.50 : 961.63 = 504.21 : x
  2. Step 2: Convert to fraction form
    641.50/961.63 = 504.21/x
  3. Step 3: Cross multiply
    641.50x = 961.63 × 504.21
  4. Step 4: Simplify right side
    641.50x = 484,863.46
  5. Step 5: Solve for x
    x = 484,863.46/641.50
  6. Step 6: Final answer
    x = 755.83

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Double scale
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1.5x scale

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.