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Finding the Fourth Proportional to 394,612,708.80, 591,919,063.20 and 103,479,268.80

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Solution

The fourth proportional to 394,612,708.80, 591,919,063.20 and 103,479,268.80 is: 155,218,903.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,612,708.80 : 591,919,063.20 = 103,479,268.80 : x
  2. Step 2: Convert to fraction form
    394,612,708.80/591,919,063.20 = 103,479,268.80/x
  3. Step 3: Cross multiply
    394,612,708.80x = 591,919,063.20 × 103,479,268.80
  4. Step 4: Simplify right side
    394,612,708.80x = 61,251,351,848,716,992
  5. Step 5: Solve for x
    x = 61,251,351,848,716,992/394,612,708.80
  6. Step 6: Final answer
    x = 155,218,903.20

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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.