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Finding the Fourth Proportional to 408,772.92, 613,158.84 and 128,312.04

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Solution

The fourth proportional to 408,772.92, 613,158.84 and 128,312.04 is: 192,467.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,772.92 : 613,158.84 = 128,312.04 : x
  2. Step 2: Convert to fraction form
    408,772.92/613,158.84 = 128,312.04/x
  3. Step 3: Cross multiply
    408,772.92x = 613,158.84 × 128,312.04
  4. Step 4: Simplify right side
    408,772.92x = 78,675,661,604.43
  5. Step 5: Solve for x
    x = 78,675,661,604.43/408,772.92
  6. Step 6: Final answer
    x = 192,467.89

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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.