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Finding the Fourth Proportional to 396,556.86, 547,019.40 and 253,155.27

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Solution

The fourth proportional to 396,556.86, 547,019.40 and 253,155.27 is: 349,208.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,556.86 : 547,019.40 = 253,155.27 : x
  2. Step 2: Convert to fraction form
    396,556.86/547,019.40 = 253,155.27/x
  3. Step 3: Cross multiply
    396,556.86x = 547,019.40 × 253,155.27
  4. Step 4: Simplify right side
    396,556.86x = 138,480,843,902.24
  5. Step 5: Solve for x
    x = 138,480,843,902.24/396,556.86
  6. Step 6: Final answer
    x = 349,208.04

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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.