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Finding the Fourth Proportional to 1,890, 2,608.38 and 1,062

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Solution

The fourth proportional to 1,890, 2,608.38 and 1,062 is: 1,465.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890 : 2,608.38 = 1,062 : x
  2. Step 2: Convert to fraction form
    1,890/2,608.38 = 1,062/x
  3. Step 3: Cross multiply
    1,890x = 2,608.38 × 1,062
  4. Step 4: Simplify right side
    1,890x = 2,770,099.56
  5. Step 5: Solve for x
    x = 2,770,099.56/1,890
  6. Step 6: Final answer
    x = 1,465.66

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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.