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Finding the Fourth Proportional to 412,182.80, 618,216.60 and 131,728.40

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Solution

The fourth proportional to 412,182.80, 618,216.60 and 131,728.40 is: 197,574.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,182.80 : 618,216.60 = 131,728.40 : x
  2. Step 2: Convert to fraction form
    412,182.80/618,216.60 = 131,728.40/x
  3. Step 3: Cross multiply
    412,182.80x = 618,216.60 × 131,728.40
  4. Step 4: Simplify right side
    412,182.80x = 81,436,683,571.44
  5. Step 5: Solve for x
    x = 81,436,683,571.44/412,182.80
  6. Step 6: Final answer
    x = 197,574.19

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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.