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Finding the Fourth Proportional to 381,609.03, 571,665.36 and 221,348.31

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Solution

The fourth proportional to 381,609.03, 571,665.36 and 221,348.31 is: 331,588.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,609.03 : 571,665.36 = 221,348.31 : x
  2. Step 2: Convert to fraction form
    381,609.03/571,665.36 = 221,348.31/x
  3. Step 3: Cross multiply
    381,609.03x = 571,665.36 × 221,348.31
  4. Step 4: Simplify right side
    381,609.03x = 126,537,160,007.85
  5. Step 5: Solve for x
    x = 126,537,160,007.85/381,609.03
  6. Step 6: Final answer
    x = 331,588.48

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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.