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Finding the Fourth Proportional to 722,339,928.53, 996,834,203.21 and 392,315,067.53

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Solution

The fourth proportional to 722,339,928.53, 996,834,203.21 and 392,315,067.53 is: 541,397,564.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,339,928.53 : 996,834,203.21 = 392,315,067.53 : x
  2. Step 2: Convert to fraction form
    722,339,928.53/996,834,203.21 = 392,315,067.53/x
  3. Step 3: Cross multiply
    722,339,928.53x = 996,834,203.21 × 392,315,067.53
  4. Step 4: Simplify right side
    722,339,928.53x = 391,073,077,748,544,896
  5. Step 5: Solve for x
    x = 391,073,077,748,544,896/722,339,928.53
  6. Step 6: Final answer
    x = 541,397,564.09

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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.