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Finding the Fourth Proportional to 380,081.20, 570,121.80 and 202,496.80

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Solution

The fourth proportional to 380,081.20, 570,121.80 and 202,496.80 is: 303,745.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,081.20 : 570,121.80 = 202,496.80 : x
  2. Step 2: Convert to fraction form
    380,081.20/570,121.80 = 202,496.80/x
  3. Step 3: Cross multiply
    380,081.20x = 570,121.80 × 202,496.80
  4. Step 4: Simplify right side
    380,081.20x = 115,447,840,110.24
  5. Step 5: Solve for x
    x = 115,447,840,110.24/380,081.20
  6. Step 6: Final answer
    x = 303,745.20

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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.