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Finding the Fourth Proportional to 408,637.52, 613,034.04 and 128,079.44

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Solution

The fourth proportional to 408,637.52, 613,034.04 and 128,079.44 is: 192,143.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,637.52 : 613,034.04 = 128,079.44 : x
  2. Step 2: Convert to fraction form
    408,637.52/613,034.04 = 128,079.44/x
  3. Step 3: Cross multiply
    408,637.52x = 613,034.04 × 128,079.44
  4. Step 4: Simplify right side
    408,637.52x = 78,517,056,544.14
  5. Step 5: Solve for x
    x = 78,517,056,544.14/408,637.52
  6. Step 6: Final answer
    x = 192,143.53

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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.