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Finding the Fourth Proportional to 378,076.55, 521,721.24 and 225,125.97

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Solution

The fourth proportional to 378,076.55, 521,721.24 and 225,125.97 is: 310,659.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,076.55 : 521,721.24 = 225,125.97 : x
  2. Step 2: Convert to fraction form
    378,076.55/521,721.24 = 225,125.97/x
  3. Step 3: Cross multiply
    378,076.55x = 521,721.24 × 225,125.97
  4. Step 4: Simplify right side
    378,076.55x = 117,452,997,423.93
  5. Step 5: Solve for x
    x = 117,452,997,423.93/378,076.55
  6. Step 6: Final answer
    x = 310,659.31

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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.