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Finding the Fourth Proportional to 455,640.91, 628,777.89 and 248,906.79

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Solution

The fourth proportional to 455,640.91, 628,777.89 and 248,906.79 is: 343,487.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,640.91 : 628,777.89 = 248,906.79 : x
  2. Step 2: Convert to fraction form
    455,640.91/628,777.89 = 248,906.79/x
  3. Step 3: Cross multiply
    455,640.91x = 628,777.89 × 248,906.79
  4. Step 4: Simplify right side
    455,640.91x = 156,507,086,222.87
  5. Step 5: Solve for x
    x = 156,507,086,222.87/455,640.91
  6. Step 6: Final answer
    x = 343,487.79

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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.