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Finding the Fourth Proportional to 396,801.54, 547,590.12 and 215,515.20

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Solution

The fourth proportional to 396,801.54, 547,590.12 and 215,515.20 is: 297,413.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,801.54 : 547,590.12 = 215,515.20 : x
  2. Step 2: Convert to fraction form
    396,801.54/547,590.12 = 215,515.20/x
  3. Step 3: Cross multiply
    396,801.54x = 547,590.12 × 215,515.20
  4. Step 4: Simplify right side
    396,801.54x = 118,013,994,229.82
  5. Step 5: Solve for x
    x = 118,013,994,229.82/396,801.54
  6. Step 6: Final answer
    x = 297,413.15

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1.5x scale

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.