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Finding the Fourth Proportional to 355,914,515.20, 533,871,772.80 and 279,473,324.80

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Solution

The fourth proportional to 355,914,515.20, 533,871,772.80 and 279,473,324.80 is: 419,209,987.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,914,515.20 : 533,871,772.80 = 279,473,324.80 : x
  2. Step 2: Convert to fraction form
    355,914,515.20/533,871,772.80 = 279,473,324.80/x
  3. Step 3: Cross multiply
    355,914,515.20x = 533,871,772.80 × 279,473,324.80
  4. Step 4: Simplify right side
    355,914,515.20x = 149,202,919,361,286,208
  5. Step 5: Solve for x
    x = 149,202,919,361,286,208/355,914,515.20
  6. Step 6: Final answer
    x = 419,209,987.20

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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.