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Finding the Fourth Proportional to 366,388.72, 505,363.98 and 257,723.56

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Solution

The fourth proportional to 366,388.72, 505,363.98 and 257,723.56 is: 355,480.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    366,388.72 : 505,363.98 = 257,723.56 : x
  2. Step 2: Convert to fraction form
    366,388.72/505,363.98 = 257,723.56/x
  3. Step 3: Cross multiply
    366,388.72x = 505,363.98 × 257,723.56
  4. Step 4: Simplify right side
    366,388.72x = 130,244,204,021.37
  5. Step 5: Solve for x
    x = 130,244,204,021.37/366,388.72
  6. Step 6: Final answer
    x = 355,480.93

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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.