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Finding the Fourth Proportional to 2,633.94, 3,950.79 and 990.36

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Solution

The fourth proportional to 2,633.94, 3,950.79 and 990.36 is: 1,485.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,633.94 : 3,950.79 = 990.36 : x
  2. Step 2: Convert to fraction form
    2,633.94/3,950.79 = 990.36/x
  3. Step 3: Cross multiply
    2,633.94x = 3,950.79 × 990.36
  4. Step 4: Simplify right side
    2,633.94x = 3,912,704.38
  5. Step 5: Solve for x
    x = 3,912,704.38/2,633.94
  6. Step 6: Final answer
    x = 1,485.49

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Double 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.