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Finding the Fourth Proportional to 396,859.89, 547,671.61 and 215,574.87

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Solution

The fourth proportional to 396,859.89, 547,671.61 and 215,574.87 is: 297,496.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,859.89 : 547,671.61 = 215,574.87 : x
  2. Step 2: Convert to fraction form
    396,859.89/547,671.61 = 215,574.87/x
  3. Step 3: Cross multiply
    396,859.89x = 547,671.61 × 215,574.87
  4. Step 4: Simplify right side
    396,859.89x = 118,064,236,128.44
  5. Step 5: Solve for x
    x = 118,064,236,128.44/396,859.89
  6. Step 6: Final answer
    x = 297,496.02

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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.