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Finding the Fourth Proportional to 408,733.80, 613,119.90 and 128,260.20

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Solution

The fourth proportional to 408,733.80, 613,119.90 and 128,260.20 is: 192,396.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,733.80 : 613,119.90 = 128,260.20 : x
  2. Step 2: Convert to fraction form
    408,733.80/613,119.90 = 128,260.20/x
  3. Step 3: Cross multiply
    408,733.80x = 613,119.90 × 128,260.20
  4. Step 4: Simplify right side
    408,733.80x = 78,638,880,997.98
  5. Step 5: Solve for x
    x = 78,638,880,997.98/408,733.80
  6. Step 6: Final answer
    x = 192,396.32

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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.