Home / 386,431.20-579,934.80-199,346.40

Finding the Fourth Proportional to 386,431.20, 579,934.80 and 199,346.40

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Solution

The fourth proportional to 386,431.20, 579,934.80 and 199,346.40 is: 299,168.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,431.20 : 579,934.80 = 199,346.40 : x
  2. Step 2: Convert to fraction form
    386,431.20/579,934.80 = 199,346.40/x
  3. Step 3: Cross multiply
    386,431.20x = 579,934.80 × 199,346.40
  4. Step 4: Simplify right side
    386,431.20x = 115,607,914,614.72
  5. Step 5: Solve for x
    x = 115,607,914,614.72/386,431.20
  6. Step 6: Final answer
    x = 299,168.17

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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.