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Finding the Fourth Proportional to 408,512.40, 613,424.70 and 308,785.20

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Solution

The fourth proportional to 408,512.40, 613,424.70 and 308,785.20 is: 463,673.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,512.40 : 613,424.70 = 308,785.20 : x
  2. Step 2: Convert to fraction form
    408,512.40/613,424.70 = 308,785.20/x
  3. Step 3: Cross multiply
    408,512.40x = 613,424.70 × 308,785.20
  4. Step 4: Simplify right side
    408,512.40x = 189,416,468,674.44
  5. Step 5: Solve for x
    x = 189,416,468,674.44/408,512.40
  6. Step 6: Final answer
    x = 463,673.73

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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.