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Finding the Fourth Proportional to 392,334,619.20, 587,494,159.20 and 311,041,204.80

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Solution

The fourth proportional to 392,334,619.20, 587,494,159.20 and 311,041,204.80 is: 465,762,851.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,334,619.20 : 587,494,159.20 = 311,041,204.80 : x
  2. Step 2: Convert to fraction form
    392,334,619.20/587,494,159.20 = 311,041,204.80/x
  3. Step 3: Cross multiply
    392,334,619.20x = 587,494,159.20 × 311,041,204.80
  4. Step 4: Simplify right side
    392,334,619.20x = 182,734,891,090,531,040
  5. Step 5: Solve for x
    x = 182,734,891,090,531,040/392,334,619.20
  6. Step 6: Final answer
    x = 465,762,851.78

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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.