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Finding the Fourth Proportional to 680,286.81, 938,772.26 and 374,334.59

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Solution

The fourth proportional to 680,286.81, 938,772.26 and 374,334.59 is: 516,568.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,286.81 : 938,772.26 = 374,334.59 : x
  2. Step 2: Convert to fraction form
    680,286.81/938,772.26 = 374,334.59/x
  3. Step 3: Cross multiply
    680,286.81x = 938,772.26 × 374,334.59
  4. Step 4: Simplify right side
    680,286.81x = 351,414,929,050.47
  5. Step 5: Solve for x
    x = 351,414,929,050.47/680,286.81
  6. Step 6: Final answer
    x = 516,568.78

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1.5x scale

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.