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Finding the Fourth Proportional to 639,104.70, 958,657.05 and 323,520.60

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Solution

The fourth proportional to 639,104.70, 958,657.05 and 323,520.60 is: 485,280.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,104.70 : 958,657.05 = 323,520.60 : x
  2. Step 2: Convert to fraction form
    639,104.70/958,657.05 = 323,520.60/x
  3. Step 3: Cross multiply
    639,104.70x = 958,657.05 × 323,520.60
  4. Step 4: Simplify right side
    639,104.70x = 310,145,304,010.23
  5. Step 5: Solve for x
    x = 310,145,304,010.23/639,104.70
  6. Step 6: Final answer
    x = 485,280.90

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Double scale
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Similar ratio
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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.