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Finding the Fourth Proportional to 393,463,807.20, 590,195,710.80 and 120,799,144.80

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Solution

The fourth proportional to 393,463,807.20, 590,195,710.80 and 120,799,144.80 is: 181,198,717.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,463,807.20 : 590,195,710.80 = 120,799,144.80 : x
  2. Step 2: Convert to fraction form
    393,463,807.20/590,195,710.80 = 120,799,144.80/x
  3. Step 3: Cross multiply
    393,463,807.20x = 590,195,710.80 × 120,799,144.80
  4. Step 4: Simplify right side
    393,463,807.20x = 71,295,137,129,268,120
  5. Step 5: Solve for x
    x = 71,295,137,129,268,120/393,463,807.20
  6. Step 6: Final answer
    x = 181,198,717.20

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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.