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Finding the Fourth Proportional to 679,989.20, 938,379.92 and 374,059

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Solution

The fourth proportional to 679,989.20, 938,379.92 and 374,059 is: 516,198.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,989.20 : 938,379.92 = 374,059 : x
  2. Step 2: Convert to fraction form
    679,989.20/938,379.92 = 374,059/x
  3. Step 3: Cross multiply
    679,989.20x = 938,379.92 × 374,059
  4. Step 4: Simplify right side
    679,989.20x = 351,009,454,495.28
  5. Step 5: Solve for x
    x = 351,009,454,495.28/679,989.20
  6. Step 6: Final answer
    x = 516,198.57

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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.