Home / 386,490.20-580,023.30-199,405.40

Finding the Fourth Proportional to 386,490.20, 580,023.30 and 199,405.40

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Solution

The fourth proportional to 386,490.20, 580,023.30 and 199,405.40 is: 299,256.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,490.20 : 580,023.30 = 199,405.40 : x
  2. Step 2: Convert to fraction form
    386,490.20/580,023.30 = 199,405.40/x
  3. Step 3: Cross multiply
    386,490.20x = 580,023.30 × 199,405.40
  4. Step 4: Simplify right side
    386,490.20x = 115,659,778,145.82
  5. Step 5: Solve for x
    x = 115,659,778,145.82/386,490.20
  6. Step 6: Final answer
    x = 299,256.69

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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.