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Finding the Fourth Proportional to 396,855.70, 547,671.06 and 215,578

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Solution

The fourth proportional to 396,855.70, 547,671.06 and 215,578 is: 297,503.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,855.70 : 547,671.06 = 215,578 : x
  2. Step 2: Convert to fraction form
    396,855.70/547,671.06 = 215,578/x
  3. Step 3: Cross multiply
    396,855.70x = 547,671.06 × 215,578
  4. Step 4: Simplify right side
    396,855.70x = 118,065,830,694.79
  5. Step 5: Solve for x
    x = 118,065,830,694.79/396,855.70
  6. Step 6: Final answer
    x = 297,503.18

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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.