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Finding the Fourth Proportional to 521,251.83, 780,403.32 and 331,241.22

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Solution

The fourth proportional to 521,251.83, 780,403.32 and 331,241.22 is: 495,924.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,251.83 : 780,403.32 = 331,241.22 : x
  2. Step 2: Convert to fraction form
    521,251.83/780,403.32 = 331,241.22/x
  3. Step 3: Cross multiply
    521,251.83x = 780,403.32 × 331,241.22
  4. Step 4: Simplify right side
    521,251.83x = 258,501,747,808.85
  5. Step 5: Solve for x
    x = 258,501,747,808.85/521,251.83
  6. Step 6: Final answer
    x = 495,924.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.