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Finding the Fourth Proportional to 203,438.80, 305,158.20 and 193,070.80

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Solution

The fourth proportional to 203,438.80, 305,158.20 and 193,070.80 is: 289,606.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,438.80 : 305,158.20 = 193,070.80 : x
  2. Step 2: Convert to fraction form
    203,438.80/305,158.20 = 193,070.80/x
  3. Step 3: Cross multiply
    203,438.80x = 305,158.20 × 193,070.80
  4. Step 4: Simplify right side
    203,438.80x = 58,917,137,800.56
  5. Step 5: Solve for x
    x = 58,917,137,800.56/203,438.80
  6. Step 6: Final answer
    x = 289,606.20

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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.