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Finding the Fourth Proportional to 2,912.05, 4,017.99 and 1,903.99

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Solution

The fourth proportional to 2,912.05, 4,017.99 and 1,903.99 is: 2,627.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.05 : 4,017.99 = 1,903.99 : x
  2. Step 2: Convert to fraction form
    2,912.05/4,017.99 = 1,903.99/x
  3. Step 3: Cross multiply
    2,912.05x = 4,017.99 × 1,903.99
  4. Step 4: Simplify right side
    2,912.05x = 7,650,212.78
  5. Step 5: Solve for x
    x = 7,650,212.78/2,912.05
  6. Step 6: Final answer
    x = 2,627.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.