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Finding the Fourth Proportional to 408,392.64, 612,540.32 and 108,895.68

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Solution

The fourth proportional to 408,392.64, 612,540.32 and 108,895.68 is: 163,330.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,392.64 : 612,540.32 = 108,895.68 : x
  2. Step 2: Convert to fraction form
    408,392.64/612,540.32 = 108,895.68/x
  3. Step 3: Cross multiply
    408,392.64x = 612,540.32 × 108,895.68
  4. Step 4: Simplify right side
    408,392.64x = 66,702,994,673.82
  5. Step 5: Solve for x
    x = 66,702,994,673.82/408,392.64
  6. Step 6: Final answer
    x = 163,330.55

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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.