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Finding the Fourth Proportional to 396,878.80, 547,702.59 and 215,590.66

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Solution

The fourth proportional to 396,878.80, 547,702.59 and 215,590.66 is: 297,520.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,878.80 : 547,702.59 = 215,590.66 : x
  2. Step 2: Convert to fraction form
    396,878.80/547,702.59 = 215,590.66/x
  3. Step 3: Cross multiply
    396,878.80x = 547,702.59 × 215,590.66
  4. Step 4: Simplify right side
    396,878.80x = 118,079,562,861.81
  5. Step 5: Solve for x
    x = 118,079,562,861.81/396,878.80
  6. Step 6: Final answer
    x = 297,520.46

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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.