Home / 1,291,111.80-1,936,667.70-659,815.80

Finding the Fourth Proportional to 1,291,111.80, 1,936,667.70 and 659,815.80

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Solution

The fourth proportional to 1,291,111.80, 1,936,667.70 and 659,815.80 is: 989,723.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,111.80 : 1,936,667.70 = 659,815.80 : x
  2. Step 2: Convert to fraction form
    1,291,111.80/1,936,667.70 = 659,815.80/x
  3. Step 3: Cross multiply
    1,291,111.80x = 1,936,667.70 × 659,815.80
  4. Step 4: Simplify right side
    1,291,111.80x = 1,277,843,947,809.66
  5. Step 5: Solve for x
    x = 1,277,843,947,809.66/1,291,111.80
  6. Step 6: Final answer
    x = 989,723.70

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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.