Home / 628,578,733.70-867,301,847.78-381,120,908.42

Finding the Fourth Proportional to 628,578,733.70, 867,301,847.78 and 381,120,908.42

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Solution

The fourth proportional to 628,578,733.70, 867,301,847.78 and 381,120,908.42 is: 525,863,905.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,578,733.70 : 867,301,847.78 = 381,120,908.42 : x
  2. Step 2: Convert to fraction form
    628,578,733.70/867,301,847.78 = 381,120,908.42/x
  3. Step 3: Cross multiply
    628,578,733.70x = 867,301,847.78 × 381,120,908.42
  4. Step 4: Simplify right side
    628,578,733.70x = 330,546,868,100,520,832
  5. Step 5: Solve for x
    x = 330,546,868,100,520,832/628,578,733.70
  6. Step 6: Final answer
    x = 525,863,905.95

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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.