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Finding the Fourth Proportional to 1,318,679,807.20, 1,978,019,710.80 and 336,104,447.20

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Solution

The fourth proportional to 1,318,679,807.20, 1,978,019,710.80 and 336,104,447.20 is: 504,156,670.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,679,807.20 : 1,978,019,710.80 = 336,104,447.20 : x
  2. Step 2: Convert to fraction form
    1,318,679,807.20/1,978,019,710.80 = 336,104,447.20/x
  3. Step 3: Cross multiply
    1,318,679,807.20x = 1,978,019,710.80 × 336,104,447.20
  4. Step 4: Simplify right side
    1,318,679,807.20x = 664,821,221,449,137,792
  5. Step 5: Solve for x
    x = 664,821,221,449,137,792/1,318,679,807.20
  6. Step 6: Final answer
    x = 504,156,670.80

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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.