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Finding the Fourth Proportional to 396,897.84, 547,722.81 and 215,611.13

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Solution

The fourth proportional to 396,897.84, 547,722.81 and 215,611.13 is: 297,545.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,897.84 : 547,722.81 = 215,611.13 : x
  2. Step 2: Convert to fraction form
    396,897.84/547,722.81 = 215,611.13/x
  3. Step 3: Cross multiply
    396,897.84x = 547,722.81 × 215,611.13
  4. Step 4: Simplify right side
    396,897.84x = 118,095,135,360.18
  5. Step 5: Solve for x
    x = 118,095,135,360.18/396,897.84
  6. Step 6: Final answer
    x = 297,545.42

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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.