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Finding the Fourth Proportional to 579,702,993.80, 869,554,490.70 and 396,036,984.20

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Solution

The fourth proportional to 579,702,993.80, 869,554,490.70 and 396,036,984.20 is: 594,055,476.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,702,993.80 : 869,554,490.70 = 396,036,984.20 : x
  2. Step 2: Convert to fraction form
    579,702,993.80/869,554,490.70 = 396,036,984.20/x
  3. Step 3: Cross multiply
    579,702,993.80x = 869,554,490.70 × 396,036,984.20
  4. Step 4: Simplify right side
    579,702,993.80x = 344,375,738,094,394,944
  5. Step 5: Solve for x
    x = 344,375,738,094,394,944/579,702,993.80
  6. Step 6: Final answer
    x = 594,055,476.30

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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.