Home / 812,156.31-1,120,285.39-521,670.09

Finding the Fourth Proportional to 812,156.31, 1,120,285.39 and 521,670.09

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Solution

The fourth proportional to 812,156.31, 1,120,285.39 and 521,670.09 is: 719,589.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,156.31 : 1,120,285.39 = 521,670.09 : x
  2. Step 2: Convert to fraction form
    812,156.31/1,120,285.39 = 521,670.09/x
  3. Step 3: Cross multiply
    812,156.31x = 1,120,285.39 × 521,670.09
  4. Step 4: Simplify right side
    812,156.31x = 584,419,380,226.99
  5. Step 5: Solve for x
    x = 584,419,380,226.99/812,156.31
  6. Step 6: Final answer
    x = 719,589.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.