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Finding the Fourth Proportional to 323,290.72, 445,986.84 and 251,177.20

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Solution

The fourth proportional to 323,290.72, 445,986.84 and 251,177.20 is: 346,504.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,290.72 : 445,986.84 = 251,177.20 : x
  2. Step 2: Convert to fraction form
    323,290.72/445,986.84 = 251,177.20/x
  3. Step 3: Cross multiply
    323,290.72x = 445,986.84 × 251,177.20
  4. Step 4: Simplify right side
    323,290.72x = 112,021,725,708.05
  5. Step 5: Solve for x
    x = 112,021,725,708.05/323,290.72
  6. Step 6: Final answer
    x = 346,504.61

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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.