Home / 1,189,879.76-1,785,528.86-431,780.38

Finding the Fourth Proportional to 1,189,879.76, 1,785,528.86 and 431,780.38

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Solution

The fourth proportional to 1,189,879.76, 1,785,528.86 and 431,780.38 is: 647,927.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,879.76 : 1,785,528.86 = 431,780.38 : x
  2. Step 2: Convert to fraction form
    1,189,879.76/1,785,528.86 = 431,780.38/x
  3. Step 3: Cross multiply
    1,189,879.76x = 1,785,528.86 × 431,780.38
  4. Step 4: Simplify right side
    1,189,879.76x = 770,956,323,049.04
  5. Step 5: Solve for x
    x = 770,956,323,049.04/1,189,879.76
  6. Step 6: Final answer
    x = 647,927.92

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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.