Home / 812,693.76-1,219,120.83-280,144.68

Finding the Fourth Proportional to 812,693.76, 1,219,120.83 and 280,144.68

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Solution

The fourth proportional to 812,693.76, 1,219,120.83 and 280,144.68 is: 420,244.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,693.76 : 1,219,120.83 = 280,144.68 : x
  2. Step 2: Convert to fraction form
    812,693.76/1,219,120.83 = 280,144.68/x
  3. Step 3: Cross multiply
    812,693.76x = 1,219,120.83 × 280,144.68
  4. Step 4: Simplify right side
    812,693.76x = 341,530,214,801.68
  5. Step 5: Solve for x
    x = 341,530,214,801.68/812,693.76
  6. Step 6: Final answer
    x = 420,244.66

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1.5x scale

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.