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Finding the Fourth Proportional to 393,660,673.80, 590,491,010.70 and 120,996,011.40

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Solution

The fourth proportional to 393,660,673.80, 590,491,010.70 and 120,996,011.40 is: 181,494,017.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,660,673.80 : 590,491,010.70 = 120,996,011.40 : x
  2. Step 2: Convert to fraction form
    393,660,673.80/590,491,010.70 = 120,996,011.40/x
  3. Step 3: Cross multiply
    393,660,673.80x = 590,491,010.70 × 120,996,011.40
  4. Step 4: Simplify right side
    393,660,673.80x = 71,447,057,062,254,728
  5. Step 5: Solve for x
    x = 71,447,057,062,254,728/393,660,673.80
  6. Step 6: Final answer
    x = 181,494,017.10

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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.