Home / 812,704.76-1,219,137.36-280,155.68

Finding the Fourth Proportional to 812,704.76, 1,219,137.36 and 280,155.68

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Solution

The fourth proportional to 812,704.76, 1,219,137.36 and 280,155.68 is: 420,261.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,704.76 : 1,219,137.36 = 280,155.68 : x
  2. Step 2: Convert to fraction form
    812,704.76/1,219,137.36 = 280,155.68/x
  3. Step 3: Cross multiply
    812,704.76x = 1,219,137.36 × 280,155.68
  4. Step 4: Simplify right side
    812,704.76x = 341,548,256,104.21
  5. Step 5: Solve for x
    x = 341,548,256,104.21/812,704.76
  6. Step 6: Final answer
    x = 420,261.17

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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.