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Finding the Fourth Proportional to 303,638.70, 455,458.05 and 191,664.30

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Solution

The fourth proportional to 303,638.70, 455,458.05 and 191,664.30 is: 287,496.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,638.70 : 455,458.05 = 191,664.30 : x
  2. Step 2: Convert to fraction form
    303,638.70/455,458.05 = 191,664.30/x
  3. Step 3: Cross multiply
    303,638.70x = 455,458.05 × 191,664.30
  4. Step 4: Simplify right side
    303,638.70x = 87,295,048,332.62
  5. Step 5: Solve for x
    x = 87,295,048,332.62/303,638.70
  6. Step 6: Final answer
    x = 287,496.45

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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.