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Finding the Fourth Proportional to 722,296,311.40, 996,854,002.50 and 428,940,879.40

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Solution

The fourth proportional to 722,296,311.40, 996,854,002.50 and 428,940,879.40 is: 591,988,946.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,296,311.40 : 996,854,002.50 = 428,940,879.40 : x
  2. Step 2: Convert to fraction form
    722,296,311.40/996,854,002.50 = 428,940,879.40/x
  3. Step 3: Cross multiply
    722,296,311.40x = 996,854,002.50 × 428,940,879.40
  4. Step 4: Simplify right side
    722,296,311.40x = 427,591,432,465,759,744
  5. Step 5: Solve for x
    x = 427,591,432,465,759,744/722,296,311.40
  6. Step 6: Final answer
    x = 591,988,946.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.