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Finding the Fourth Proportional to 521,591.70, 781,804.35 and 222,021.30

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Solution

The fourth proportional to 521,591.70, 781,804.35 and 222,021.30 is: 332,783.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,591.70 : 781,804.35 = 222,021.30 : x
  2. Step 2: Convert to fraction form
    521,591.70/781,804.35 = 222,021.30/x
  3. Step 3: Cross multiply
    521,591.70x = 781,804.35 × 222,021.30
  4. Step 4: Simplify right side
    521,591.70x = 173,577,218,132.66
  5. Step 5: Solve for x
    x = 173,577,218,132.66/521,591.70
  6. Step 6: Final answer
    x = 332,783.70

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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.