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Finding the Fourth Proportional to 721,635.44, 995,847.06 and 399,325.90

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Solution

The fourth proportional to 721,635.44, 995,847.06 and 399,325.90 is: 551,064.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,635.44 : 995,847.06 = 399,325.90 : x
  2. Step 2: Convert to fraction form
    721,635.44/995,847.06 = 399,325.90/x
  3. Step 3: Cross multiply
    721,635.44x = 995,847.06 × 399,325.90
  4. Step 4: Simplify right side
    721,635.44x = 397,667,523,496.85
  5. Step 5: Solve for x
    x = 397,667,523,496.85/721,635.44
  6. Step 6: Final answer
    x = 551,064.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.