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Finding the Fourth Proportional to 408,195.90, 612,282.51 and 108,679.05

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Solution

The fourth proportional to 408,195.90, 612,282.51 and 108,679.05 is: 163,015.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,195.90 : 612,282.51 = 108,679.05 : x
  2. Step 2: Convert to fraction form
    408,195.90/612,282.51 = 108,679.05/x
  3. Step 3: Cross multiply
    408,195.90x = 612,282.51 × 108,679.05
  4. Step 4: Simplify right side
    408,195.90x = 66,542,281,518.42
  5. Step 5: Solve for x
    x = 66,542,281,518.42/408,195.90
  6. Step 6: Final answer
    x = 163,015.56

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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.