Home / 386,257.20-579,443.40-136,919.60

Finding the Fourth Proportional to 386,257.20, 579,443.40 and 136,919.60

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Solution

The fourth proportional to 386,257.20, 579,443.40 and 136,919.60 is: 205,399.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,257.20 : 579,443.40 = 136,919.60 : x
  2. Step 2: Convert to fraction form
    386,257.20/579,443.40 = 136,919.60/x
  3. Step 3: Cross multiply
    386,257.20x = 579,443.40 × 136,919.60
  4. Step 4: Simplify right side
    386,257.20x = 79,337,158,550.64
  5. Step 5: Solve for x
    x = 79,337,158,550.64/386,257.20
  6. Step 6: Final answer
    x = 205,399.82

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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.