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Finding the Fourth Proportional to 4,990.05, 7,485.02 and 1,912.05

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Solution

The fourth proportional to 4,990.05, 7,485.02 and 1,912.05 is: 2,868.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.05 : 7,485.02 = 1,912.05 : x
  2. Step 2: Convert to fraction form
    4,990.05/7,485.02 = 1,912.05/x
  3. Step 3: Cross multiply
    4,990.05x = 7,485.02 × 1,912.05
  4. Step 4: Simplify right side
    4,990.05x = 14,311,732.49
  5. Step 5: Solve for x
    x = 14,311,732.49/4,990.05
  6. Step 6: Final answer
    x = 2,868.05

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.