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Finding the Fourth Proportional to 412,992.72, 619,415.20 and 109,388.96

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Solution

The fourth proportional to 412,992.72, 619,415.20 and 109,388.96 is: 164,063.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,992.72 : 619,415.20 = 109,388.96 : x
  2. Step 2: Convert to fraction form
    412,992.72/619,415.20 = 109,388.96/x
  3. Step 3: Cross multiply
    412,992.72x = 619,415.20 × 109,388.96
  4. Step 4: Simplify right side
    412,992.72x = 67,757,184,536.19
  5. Step 5: Solve for x
    x = 67,757,184,536.19/412,992.72
  6. Step 6: Final answer
    x = 164,063.87

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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.