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Finding the Fourth Proportional to 381,721.55, 572,404.59 and 141,668.26

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Solution

The fourth proportional to 381,721.55, 572,404.59 and 141,668.26 is: 212,436.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,721.55 : 572,404.59 = 141,668.26 : x
  2. Step 2: Convert to fraction form
    381,721.55/572,404.59 = 141,668.26/x
  3. Step 3: Cross multiply
    381,721.55x = 572,404.59 × 141,668.26
  4. Step 4: Simplify right side
    381,721.55x = 81,091,560,850.30
  5. Step 5: Solve for x
    x = 81,091,560,850.30/381,721.55
  6. Step 6: Final answer
    x = 212,436.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.