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Finding the Fourth Proportional to 2,148, 3,236.62 and 1,912.28

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Solution

The fourth proportional to 2,148, 3,236.62 and 1,912.28 is: 2,881.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148 : 3,236.62 = 1,912.28 : x
  2. Step 2: Convert to fraction form
    2,148/3,236.62 = 1,912.28/x
  3. Step 3: Cross multiply
    2,148x = 3,236.62 × 1,912.28
  4. Step 4: Simplify right side
    2,148x = 6,189,323.69
  5. Step 5: Solve for x
    x = 6,189,323.69/2,148
  6. Step 6: Final answer
    x = 2,881.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.