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Finding the Fourth Proportional to 408,338.02, 612,716.55 and 168,629.86

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Solution

The fourth proportional to 408,338.02, 612,716.55 and 168,629.86 is: 253,031.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,338.02 : 612,716.55 = 168,629.86 : x
  2. Step 2: Convert to fraction form
    408,338.02/612,716.55 = 168,629.86/x
  3. Step 3: Cross multiply
    408,338.02x = 612,716.55 × 168,629.86
  4. Step 4: Simplify right side
    408,338.02x = 103,322,306,046.18
  5. Step 5: Solve for x
    x = 103,322,306,046.18/408,338.02
  6. Step 6: Final answer
    x = 253,031.31

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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.