Home / 643,797,143.70-888,461,517.96-361,589,315.85

Finding the Fourth Proportional to 643,797,143.70, 888,461,517.96 and 361,589,315.85

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Solution

The fourth proportional to 643,797,143.70, 888,461,517.96 and 361,589,315.85 is: 499,005,308.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,797,143.70 : 888,461,517.96 = 361,589,315.85 : x
  2. Step 2: Convert to fraction form
    643,797,143.70/888,461,517.96 = 361,589,315.85/x
  3. Step 3: Cross multiply
    643,797,143.70x = 888,461,517.96 × 361,589,315.85
  4. Step 4: Simplify right side
    643,797,143.70x = 321,258,192,438,208,896
  5. Step 5: Solve for x
    x = 321,258,192,438,208,896/643,797,143.70
  6. Step 6: Final answer
    x = 499,005,308.71

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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.