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Finding the Fourth Proportional to 416,310.78, 624,525.11 and 128,146.20

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Solution

The fourth proportional to 416,310.78, 624,525.11 and 128,146.20 is: 192,237.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    416,310.78 : 624,525.11 = 128,146.20 : x
  2. Step 2: Convert to fraction form
    416,310.78/624,525.11 = 128,146.20/x
  3. Step 3: Cross multiply
    416,310.78x = 624,525.11 × 128,146.20
  4. Step 4: Simplify right side
    416,310.78x = 80,030,517,148.93
  5. Step 5: Solve for x
    x = 80,030,517,148.93/416,310.78
  6. Step 6: Final answer
    x = 192,237.43

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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.