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Finding the Fourth Proportional to 392,992.80, 589,489.20 and 108,682.80

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Solution

The fourth proportional to 392,992.80, 589,489.20 and 108,682.80 is: 163,024.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,992.80 : 589,489.20 = 108,682.80 : x
  2. Step 2: Convert to fraction form
    392,992.80/589,489.20 = 108,682.80/x
  3. Step 3: Cross multiply
    392,992.80x = 589,489.20 × 108,682.80
  4. Step 4: Simplify right side
    392,992.80x = 64,067,336,825.76
  5. Step 5: Solve for x
    x = 64,067,336,825.76/392,992.80
  6. Step 6: Final answer
    x = 163,024.20

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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.