Home / 1,221,786.47-1,686,157.65-678,025.07

Finding the Fourth Proportional to 1,221,786.47, 1,686,157.65 and 678,025.07

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Solution

The fourth proportional to 1,221,786.47, 1,686,157.65 and 678,025.07 is: 935,725.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,786.47 : 1,686,157.65 = 678,025.07 : x
  2. Step 2: Convert to fraction form
    1,221,786.47/1,686,157.65 = 678,025.07/x
  3. Step 3: Cross multiply
    1,221,786.47x = 1,686,157.65 × 678,025.07
  4. Step 4: Simplify right side
    1,221,786.47x = 1,143,257,150,241.50
  5. Step 5: Solve for x
    x = 1,143,257,150,241.50/1,221,786.47
  6. Step 6: Final answer
    x = 935,725.83

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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.