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Finding the Fourth Proportional to 396,861.04, 547,678.11 and 215,572.91

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Solution

The fourth proportional to 396,861.04, 547,678.11 and 215,572.91 is: 297,495.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,861.04 : 547,678.11 = 215,572.91 : x
  2. Step 2: Convert to fraction form
    396,861.04/547,678.11 = 215,572.91/x
  3. Step 3: Cross multiply
    396,861.04x = 547,678.11 × 215,572.91
  4. Step 4: Simplify right side
    396,861.04x = 118,064,562,838.14
  5. Step 5: Solve for x
    x = 118,064,562,838.14/396,861.04
  6. Step 6: Final answer
    x = 297,495.98

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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.