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Finding the Fourth Proportional to 521,911.92, 720,241.20 and 292,469.76

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Solution

The fourth proportional to 521,911.92, 720,241.20 and 292,469.76 is: 403,609.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,911.92 : 720,241.20 = 292,469.76 : x
  2. Step 2: Convert to fraction form
    521,911.92/720,241.20 = 292,469.76/x
  3. Step 3: Cross multiply
    521,911.92x = 720,241.20 × 292,469.76
  4. Step 4: Simplify right side
    521,911.92x = 210,648,770,906.11
  5. Step 5: Solve for x
    x = 210,648,770,906.11/521,911.92
  6. Step 6: Final answer
    x = 403,609.81

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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.