Home / 812,693.90-1,219,121.02-280,144.82

Finding the Fourth Proportional to 812,693.90, 1,219,121.02 and 280,144.82

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Solution

The fourth proportional to 812,693.90, 1,219,121.02 and 280,144.82 is: 420,244.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,693.90 : 1,219,121.02 = 280,144.82 : x
  2. Step 2: Convert to fraction form
    812,693.90/1,219,121.02 = 280,144.82/x
  3. Step 3: Cross multiply
    812,693.90x = 1,219,121.02 × 280,144.82
  4. Step 4: Simplify right side
    812,693.90x = 341,530,438,706.12
  5. Step 5: Solve for x
    x = 341,530,438,706.12/812,693.90
  6. Step 6: Final answer
    x = 420,244.87

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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.