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Finding the Fourth Proportional to 408,142.16, 612,218.37 and 108,620.90

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Solution

The fourth proportional to 408,142.16, 612,218.37 and 108,620.90 is: 162,932.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,142.16 : 612,218.37 = 108,620.90 : x
  2. Step 2: Convert to fraction form
    408,142.16/612,218.37 = 108,620.90/x
  3. Step 3: Cross multiply
    408,142.16x = 612,218.37 × 108,620.90
  4. Step 4: Simplify right side
    408,142.16x = 66,499,707,284.84
  5. Step 5: Solve for x
    x = 66,499,707,284.84/408,142.16
  6. Step 6: Final answer
    x = 162,932.71

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1.5x scale

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.