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Finding the Fourth Proportional to 396,702.06, 547,447.11 and 215,412.51

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Solution

The fourth proportional to 396,702.06, 547,447.11 and 215,412.51 is: 297,268.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,702.06 : 547,447.11 = 215,412.51 : x
  2. Step 2: Convert to fraction form
    396,702.06/547,447.11 = 215,412.51/x
  3. Step 3: Cross multiply
    396,702.06x = 547,447.11 × 215,412.51
  4. Step 4: Simplify right side
    396,702.06x = 117,926,957,302.48
  5. Step 5: Solve for x
    x = 117,926,957,302.48/396,702.06
  6. Step 6: Final answer
    x = 297,268.33

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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.