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Finding the Fourth Proportional to 408,423.57, 612,664.52 and 108,902.58

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Solution

The fourth proportional to 408,423.57, 612,664.52 and 108,902.58 is: 163,361.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,423.57 : 612,664.52 = 108,902.58 : x
  2. Step 2: Convert to fraction form
    408,423.57/612,664.52 = 108,902.58/x
  3. Step 3: Cross multiply
    408,423.57x = 612,664.52 × 108,902.58
  4. Step 4: Simplify right side
    408,423.57x = 66,720,746,357.95
  5. Step 5: Solve for x
    x = 66,720,746,357.95/408,423.57
  6. Step 6: Final answer
    x = 163,361.65

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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.