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Finding the Fourth Proportional to 396,886.03, 547,706.61 and 215,599.42

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Solution

The fourth proportional to 396,886.03, 547,706.61 and 215,599.42 is: 297,529.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,886.03 : 547,706.61 = 215,599.42 : x
  2. Step 2: Convert to fraction form
    396,886.03/547,706.61 = 215,599.42/x
  3. Step 3: Cross multiply
    396,886.03x = 547,706.61 × 215,599.42
  4. Step 4: Simplify right side
    396,886.03x = 118,085,228,130.80
  5. Step 5: Solve for x
    x = 118,085,228,130.80/396,886.03
  6. Step 6: Final answer
    x = 297,529.32

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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.