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Finding the Fourth Proportional to 2,633.70, 3,950.99 and 990.38

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Solution

The fourth proportional to 2,633.70, 3,950.99 and 990.38 is: 1,485.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,633.70 : 3,950.99 = 990.38 : x
  2. Step 2: Convert to fraction form
    2,633.70/3,950.99 = 990.38/x
  3. Step 3: Cross multiply
    2,633.70x = 3,950.99 × 990.38
  4. Step 4: Simplify right side
    2,633.70x = 3,912,990.12
  5. Step 5: Solve for x
    x = 3,912,990.12/2,633.70
  6. Step 6: Final answer
    x = 1,485.74

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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.