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Finding the Fourth Proportional to 4,990.50, 7,486.11 and 1,912.50

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Solution

The fourth proportional to 4,990.50, 7,486.11 and 1,912.50 is: 2,868.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.50 : 7,486.11 = 1,912.50 : x
  2. Step 2: Convert to fraction form
    4,990.50/7,486.11 = 1,912.50/x
  3. Step 3: Cross multiply
    4,990.50x = 7,486.11 × 1,912.50
  4. Step 4: Simplify right side
    4,990.50x = 14,317,185.38
  5. Step 5: Solve for x
    x = 14,317,185.38/4,990.50
  6. Step 6: Final answer
    x = 2,868.89

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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.