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Finding the Fourth Proportional to 521,703.20, 781,971.60 and 222,132.80

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Solution

The fourth proportional to 521,703.20, 781,971.60 and 222,132.80 is: 332,950.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,703.20 : 781,971.60 = 222,132.80 : x
  2. Step 2: Convert to fraction form
    521,703.20/781,971.60 = 222,132.80/x
  3. Step 3: Cross multiply
    521,703.20x = 781,971.60 × 222,132.80
  4. Step 4: Simplify right side
    521,703.20x = 173,701,541,028.48
  5. Step 5: Solve for x
    x = 173,701,541,028.48/521,703.20
  6. Step 6: Final answer
    x = 332,950.88

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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.