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Finding the Fourth Proportional to 660,578.67, 911,568.05 and 374,100.80

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Solution

The fourth proportional to 660,578.67, 911,568.05 and 374,100.80 is: 516,241.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,578.67 : 911,568.05 = 374,100.80 : x
  2. Step 2: Convert to fraction form
    660,578.67/911,568.05 = 374,100.80/x
  3. Step 3: Cross multiply
    660,578.67x = 911,568.05 × 374,100.80
  4. Step 4: Simplify right side
    660,578.67x = 341,018,336,759.44
  5. Step 5: Solve for x
    x = 341,018,336,759.44/660,578.67
  6. Step 6: Final answer
    x = 516,241.82

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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.