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Finding the Fourth Proportional to 407,891.87, 562,906.64 and 279,100.35

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Solution

The fourth proportional to 407,891.87, 562,906.64 and 279,100.35 is: 385,169.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,891.87 : 562,906.64 = 279,100.35 : x
  2. Step 2: Convert to fraction form
    407,891.87/562,906.64 = 279,100.35/x
  3. Step 3: Cross multiply
    407,891.87x = 562,906.64 × 279,100.35
  4. Step 4: Simplify right side
    407,891.87x = 157,107,443,049.98
  5. Step 5: Solve for x
    x = 157,107,443,049.98/407,891.87
  6. Step 6: Final answer
    x = 385,169.34

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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.