Home / 1,189,351.20-1,641,316.92-645,491.68

Finding the Fourth Proportional to 1,189,351.20, 1,641,316.92 and 645,491.68

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Solution

The fourth proportional to 1,189,351.20, 1,641,316.92 and 645,491.68 is: 890,785.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,351.20 : 1,641,316.92 = 645,491.68 : x
  2. Step 2: Convert to fraction form
    1,189,351.20/1,641,316.92 = 645,491.68/x
  3. Step 3: Cross multiply
    1,189,351.20x = 1,641,316.92 × 645,491.68
  4. Step 4: Simplify right side
    1,189,351.20x = 1,059,456,412,875.77
  5. Step 5: Solve for x
    x = 1,059,456,412,875.77/1,189,351.20
  6. Step 6: Final answer
    x = 890,785.18

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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.