Home / 521,716.20-781,991.10-222,145.80

Finding the Fourth Proportional to 521,716.20, 781,991.10 and 222,145.80

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Solution

The fourth proportional to 521,716.20, 781,991.10 and 222,145.80 is: 332,970.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,716.20 : 781,991.10 = 222,145.80 : x
  2. Step 2: Convert to fraction form
    521,716.20/781,991.10 = 222,145.80/x
  3. Step 3: Cross multiply
    521,716.20x = 781,991.10 × 222,145.80
  4. Step 4: Simplify right side
    521,716.20x = 173,716,038,502.38
  5. Step 5: Solve for x
    x = 173,716,038,502.38/521,716.20
  6. Step 6: Final answer
    x = 332,970.37

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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.