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Finding the Fourth Proportional to 722,099.96, 996,529.07 and 399,810.05

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Solution

The fourth proportional to 722,099.96, 996,529.07 and 399,810.05 is: 551,755.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,099.96 : 996,529.07 = 399,810.05 : x
  2. Step 2: Convert to fraction form
    722,099.96/996,529.07 = 399,810.05/x
  3. Step 3: Cross multiply
    722,099.96x = 996,529.07 × 399,810.05
  4. Step 4: Simplify right side
    722,099.96x = 398,422,340,794.00
  5. Step 5: Solve for x
    x = 398,422,340,794.00/722,099.96
  6. Step 6: Final answer
    x = 551,755.11

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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.