Home / 386,463.20-579,982.80-199,378.40

Finding the Fourth Proportional to 386,463.20, 579,982.80 and 199,378.40

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Solution

The fourth proportional to 386,463.20, 579,982.80 and 199,378.40 is: 299,216.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,463.20 : 579,982.80 = 199,378.40 : x
  2. Step 2: Convert to fraction form
    386,463.20/579,982.80 = 199,378.40/x
  3. Step 3: Cross multiply
    386,463.20x = 579,982.80 × 199,378.40
  4. Step 4: Simplify right side
    386,463.20x = 115,636,042,691.52
  5. Step 5: Solve for x
    x = 115,636,042,691.52/386,463.20
  6. Step 6: Final answer
    x = 299,216.18

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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.