Home / 812,515.90-1,218,027.45-279,910.30

Finding the Fourth Proportional to 812,515.90, 1,218,027.45 and 279,910.30

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Solution

The fourth proportional to 812,515.90, 1,218,027.45 and 279,910.30 is: 419,608.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,515.90 : 1,218,027.45 = 279,910.30 : x
  2. Step 2: Convert to fraction form
    812,515.90/1,218,027.45 = 279,910.30/x
  3. Step 3: Cross multiply
    812,515.90x = 1,218,027.45 × 279,910.30
  4. Step 4: Simplify right side
    812,515.90x = 340,938,428,937.74
  5. Step 5: Solve for x
    x = 340,938,428,937.74/812,515.90
  6. Step 6: Final answer
    x = 419,608.32

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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.