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Finding the Fourth Proportional to 3,299.18, 4,949.25 and 990.38

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Solution

The fourth proportional to 3,299.18, 4,949.25 and 990.38 is: 1,485.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,299.18 : 4,949.25 = 990.38 : x
  2. Step 2: Convert to fraction form
    3,299.18/4,949.25 = 990.38/x
  3. Step 3: Cross multiply
    3,299.18x = 4,949.25 × 990.38
  4. Step 4: Simplify right side
    3,299.18x = 4,901,638.22
  5. Step 5: Solve for x
    x = 4,901,638.22/3,299.18
  6. Step 6: Final answer
    x = 1,485.71

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Double scale
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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.