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Finding the Fourth Proportional to 3,189.24, 4,783.86 and 997.98

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Solution

The fourth proportional to 3,189.24, 4,783.86 and 997.98 is: 1,496.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.24 : 4,783.86 = 997.98 : x
  2. Step 2: Convert to fraction form
    3,189.24/4,783.86 = 997.98/x
  3. Step 3: Cross multiply
    3,189.24x = 4,783.86 × 997.98
  4. Step 4: Simplify right side
    3,189.24x = 4,774,196.60
  5. Step 5: Solve for x
    x = 4,774,196.60/3,189.24
  6. Step 6: Final answer
    x = 1,496.97

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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.