Home / 1,189,223.82-1,641,129.92-645,359.61

Finding the Fourth Proportional to 1,189,223.82, 1,641,129.92 and 645,359.61

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Solution

The fourth proportional to 1,189,223.82, 1,641,129.92 and 645,359.61 is: 890,596.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,223.82 : 1,641,129.92 = 645,359.61 : x
  2. Step 2: Convert to fraction form
    1,189,223.82/1,641,129.92 = 645,359.61/x
  3. Step 3: Cross multiply
    1,189,223.82x = 1,641,129.92 × 645,359.61
  4. Step 4: Simplify right side
    1,189,223.82x = 1,059,118,965,130.53
  5. Step 5: Solve for x
    x = 1,059,118,965,130.53/1,189,223.82
  6. Step 6: Final answer
    x = 890,596.83

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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.