Home / 386,429.20-579,672.60-137,078.80

Finding the Fourth Proportional to 386,429.20, 579,672.60 and 137,078.80

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Solution

The fourth proportional to 386,429.20, 579,672.60 and 137,078.80 is: 205,628.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,429.20 : 579,672.60 = 137,078.80 : x
  2. Step 2: Convert to fraction form
    386,429.20/579,672.60 = 137,078.80/x
  3. Step 3: Cross multiply
    386,429.20x = 579,672.60 × 137,078.80
  4. Step 4: Simplify right side
    386,429.20x = 79,460,824,400.88
  5. Step 5: Solve for x
    x = 79,460,824,400.88/386,429.20
  6. Step 6: Final answer
    x = 205,628.42

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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.