Home / 1,918,785.66-2,878,138.56-639,485.82

Finding the Fourth Proportional to 1,918,785.66, 2,878,138.56 and 639,485.82

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Solution

The fourth proportional to 1,918,785.66, 2,878,138.56 and 639,485.82 is: 959,215.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918,785.66 : 2,878,138.56 = 639,485.82 : x
  2. Step 2: Convert to fraction form
    1,918,785.66/2,878,138.56 = 639,485.82/x
  3. Step 3: Cross multiply
    1,918,785.66x = 2,878,138.56 × 639,485.82
  4. Step 4: Simplify right side
    1,918,785.66x = 1,840,528,797,115.22
  5. Step 5: Solve for x
    x = 1,840,528,797,115.22/1,918,785.66
  6. Step 6: Final answer
    x = 959,215.42

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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.