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Finding the Fourth Proportional to 738,294.75, 1,018,847.44 and 398,763

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Solution

The fourth proportional to 738,294.75, 1,018,847.44 and 398,763 is: 550,293.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,294.75 : 1,018,847.44 = 398,763 : x
  2. Step 2: Convert to fraction form
    738,294.75/1,018,847.44 = 398,763/x
  3. Step 3: Cross multiply
    738,294.75x = 1,018,847.44 × 398,763
  4. Step 4: Simplify right side
    738,294.75x = 406,278,661,093.65
  5. Step 5: Solve for x
    x = 406,278,661,093.65/738,294.75
  6. Step 6: Final answer
    x = 550,293.31

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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.