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Finding the Fourth Proportional to 521,809.20, 782,130.60 and 222,238.80

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Solution

The fourth proportional to 521,809.20, 782,130.60 and 222,238.80 is: 333,109.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,809.20 : 782,130.60 = 222,238.80 : x
  2. Step 2: Convert to fraction form
    521,809.20/782,130.60 = 222,238.80/x
  3. Step 3: Cross multiply
    521,809.20x = 782,130.60 × 222,238.80
  4. Step 4: Simplify right side
    521,809.20x = 173,819,765,987.28
  5. Step 5: Solve for x
    x = 173,819,765,987.28/521,809.20
  6. Step 6: Final answer
    x = 333,109.81

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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.