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Finding the Fourth Proportional to 393,660,443.20, 590,490,664.80 and 120,995,780.80

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Solution

The fourth proportional to 393,660,443.20, 590,490,664.80 and 120,995,780.80 is: 181,493,671.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,660,443.20 : 590,490,664.80 = 120,995,780.80 : x
  2. Step 2: Convert to fraction form
    393,660,443.20/590,490,664.80 = 120,995,780.80/x
  3. Step 3: Cross multiply
    393,660,443.20x = 590,490,664.80 × 120,995,780.80
  4. Step 4: Simplify right side
    393,660,443.20x = 71,446,879,042,587,072
  5. Step 5: Solve for x
    x = 71,446,879,042,587,072/393,660,443.20
  6. Step 6: Final answer
    x = 181,493,671.20

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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.