Home / 386,728.20-580,529.70-209,143.80

Finding the Fourth Proportional to 386,728.20, 580,529.70 and 209,143.80

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Solution

The fourth proportional to 386,728.20, 580,529.70 and 209,143.80 is: 313,952.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,728.20 : 580,529.70 = 209,143.80 : x
  2. Step 2: Convert to fraction form
    386,728.20/580,529.70 = 209,143.80/x
  3. Step 3: Cross multiply
    386,728.20x = 580,529.70 × 209,143.80
  4. Step 4: Simplify right side
    386,728.20x = 121,414,187,470.86
  5. Step 5: Solve for x
    x = 121,414,187,470.86/386,728.20
  6. Step 6: Final answer
    x = 313,952.25

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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.