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Finding the Fourth Proportional to 396,909.47, 547,738.86 and 215,622.77

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Solution

The fourth proportional to 396,909.47, 547,738.86 and 215,622.77 is: 297,561.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,909.47 : 547,738.86 = 215,622.77 : x
  2. Step 2: Convert to fraction form
    396,909.47/547,738.86 = 215,622.77/x
  3. Step 3: Cross multiply
    396,909.47x = 547,738.86 × 215,622.77
  4. Step 4: Simplify right side
    396,909.47x = 118,104,967,491.15
  5. Step 5: Solve for x
    x = 118,104,967,491.15/396,909.47
  6. Step 6: Final answer
    x = 297,561.48

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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.