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Finding the Fourth Proportional to 381,406.64, 572,138.04 and 100,922

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Solution

The fourth proportional to 381,406.64, 572,138.04 and 100,922 is: 151,390.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,406.64 : 572,138.04 = 100,922 : x
  2. Step 2: Convert to fraction form
    381,406.64/572,138.04 = 100,922/x
  3. Step 3: Cross multiply
    381,406.64x = 572,138.04 × 100,922
  4. Step 4: Simplify right side
    381,406.64x = 57,741,315,272.88
  5. Step 5: Solve for x
    x = 57,741,315,272.88/381,406.64
  6. Step 6: Final answer
    x = 151,390.43

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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.