Home / 813,086.34-1,219,823.30-280,612

Finding the Fourth Proportional to 813,086.34, 1,219,823.30 and 280,612

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Solution

The fourth proportional to 813,086.34, 1,219,823.30 and 280,612 is: 420,984.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,086.34 : 1,219,823.30 = 280,612 : x
  2. Step 2: Convert to fraction form
    813,086.34/1,219,823.30 = 280,612/x
  3. Step 3: Cross multiply
    813,086.34x = 1,219,823.30 × 280,612
  4. Step 4: Simplify right side
    813,086.34x = 342,297,055,859.60
  5. Step 5: Solve for x
    x = 342,297,055,859.60/813,086.34
  6. Step 6: Final answer
    x = 420,984.88

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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.