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Finding the Fourth Proportional to 408,855.20, 613,239.65 and 109,366.00

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Solution

The fourth proportional to 408,855.20, 613,239.65 and 109,366.00 is: 164,037.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,855.20 : 613,239.65 = 109,366.00 : x
  2. Step 2: Convert to fraction form
    408,855.20/613,239.65 = 109,366.00/x
  3. Step 3: Cross multiply
    408,855.20x = 613,239.65 × 109,366.00
  4. Step 4: Simplify right side
    408,855.20x = 67,067,564,222.29
  5. Step 5: Solve for x
    x = 67,067,564,222.29/408,855.20
  6. Step 6: Final answer
    x = 164,037.45

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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.