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Finding the Fourth Proportional to 662,990.40, 993,902.40 and 396,856.80

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Solution

The fourth proportional to 662,990.40, 993,902.40 and 396,856.80 is: 594,936.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,990.40 : 993,902.40 = 396,856.80 : x
  2. Step 2: Convert to fraction form
    662,990.40/993,902.40 = 396,856.80/x
  3. Step 3: Cross multiply
    662,990.40x = 993,902.40 × 396,856.80
  4. Step 4: Simplify right side
    662,990.40x = 394,436,925,976.32
  5. Step 5: Solve for x
    x = 394,436,925,976.32/662,990.40
  6. Step 6: Final answer
    x = 594,936.10

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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.