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Finding the Fourth Proportional to 662,992.40, 993,905.40 and 396,858.80

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Solution

The fourth proportional to 662,992.40, 993,905.40 and 396,858.80 is: 594,939.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,992.40 : 993,905.40 = 396,858.80 : x
  2. Step 2: Convert to fraction form
    662,992.40/993,905.40 = 396,858.80/x
  3. Step 3: Cross multiply
    662,992.40x = 993,905.40 × 396,858.80
  4. Step 4: Simplify right side
    662,992.40x = 394,440,104,357.52
  5. Step 5: Solve for x
    x = 394,440,104,357.52/662,992.40
  6. Step 6: Final answer
    x = 594,939.10

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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.