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Finding the Fourth Proportional to 4,912.86, 7,369.02 and 1,990.38

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Solution

The fourth proportional to 4,912.86, 7,369.02 and 1,990.38 is: 2,985.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,912.86 : 7,369.02 = 1,990.38 : x
  2. Step 2: Convert to fraction form
    4,912.86/7,369.02 = 1,990.38/x
  3. Step 3: Cross multiply
    4,912.86x = 7,369.02 × 1,990.38
  4. Step 4: Simplify right side
    4,912.86x = 14,667,150.03
  5. Step 5: Solve for x
    x = 14,667,150.03/4,912.86
  6. Step 6: Final answer
    x = 2,985.46

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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.