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Finding the Fourth Proportional to 1,990.59, 2,747.43 and 1,362.39

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Solution

The fourth proportional to 1,990.59, 2,747.43 and 1,362.39 is: 1,880.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.59 : 2,747.43 = 1,362.39 : x
  2. Step 2: Convert to fraction form
    1,990.59/2,747.43 = 1,362.39/x
  3. Step 3: Cross multiply
    1,990.59x = 2,747.43 × 1,362.39
  4. Step 4: Simplify right side
    1,990.59x = 3,743,071.16
  5. Step 5: Solve for x
    x = 3,743,071.16/1,990.59
  6. Step 6: Final answer
    x = 1,880.38

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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.