Home / 386,451.20-579,964.80-199,366.40

Finding the Fourth Proportional to 386,451.20, 579,964.80 and 199,366.40

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Solution

The fourth proportional to 386,451.20, 579,964.80 and 199,366.40 is: 299,198.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,451.20 : 579,964.80 = 199,366.40 : x
  2. Step 2: Convert to fraction form
    386,451.20/579,964.80 = 199,366.40/x
  3. Step 3: Cross multiply
    386,451.20x = 579,964.80 × 199,366.40
  4. Step 4: Simplify right side
    386,451.20x = 115,625,494,302.72
  5. Step 5: Solve for x
    x = 115,625,494,302.72/386,451.20
  6. Step 6: Final answer
    x = 299,198.18

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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.