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Finding the Fourth Proportional to 3,189.86, 4,786.68 and 1,728.98

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Solution

The fourth proportional to 3,189.86, 4,786.68 and 1,728.98 is: 2,594.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.86 : 4,786.68 = 1,728.98 : x
  2. Step 2: Convert to fraction form
    3,189.86/4,786.68 = 1,728.98/x
  3. Step 3: Cross multiply
    3,189.86x = 4,786.68 × 1,728.98
  4. Step 4: Simplify right side
    3,189.86x = 8,276,073.99
  5. Step 5: Solve for x
    x = 8,276,073.99/3,189.86
  6. Step 6: Final answer
    x = 2,594.49

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Half scale
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Similar ratio
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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.