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Finding the Fourth Proportional to 666,137,286.72, 919,365,655.68 and 383,825,679.84

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Solution

The fourth proportional to 666,137,286.72, 919,365,655.68 and 383,825,679.84 is: 529,734,868.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,137,286.72 : 919,365,655.68 = 383,825,679.84 : x
  2. Step 2: Convert to fraction form
    666,137,286.72/919,365,655.68 = 383,825,679.84/x
  3. Step 3: Cross multiply
    666,137,286.72x = 919,365,655.68 × 383,825,679.84
  4. Step 4: Simplify right side
    666,137,286.72x = 352,876,147,812,923,328
  5. Step 5: Solve for x
    x = 352,876,147,812,923,328/666,137,286.72
  6. Step 6: Final answer
    x = 529,734,868.24

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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.