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Finding the Fourth Proportional to 398,601,379.80, 597,902,069.70 and 355,554,658.80

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Solution

The fourth proportional to 398,601,379.80, 597,902,069.70 and 355,554,658.80 is: 533,331,988.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,601,379.80 : 597,902,069.70 = 355,554,658.80 : x
  2. Step 2: Convert to fraction form
    398,601,379.80/597,902,069.70 = 355,554,658.80/x
  3. Step 3: Cross multiply
    398,601,379.80x = 597,902,069.70 × 355,554,658.80
  4. Step 4: Simplify right side
    398,601,379.80x = 212,586,866,387,997,344
  5. Step 5: Solve for x
    x = 212,586,866,387,997,344/398,601,379.80
  6. Step 6: Final answer
    x = 533,331,988.20

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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.