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Finding the Fourth Proportional to 3,669.31, 5,063.62 and 1,990.68

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Solution

The fourth proportional to 3,669.31, 5,063.62 and 1,990.68 is: 2,747.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,669.31 : 5,063.62 = 1,990.68 : x
  2. Step 2: Convert to fraction form
    3,669.31/5,063.62 = 1,990.68/x
  3. Step 3: Cross multiply
    3,669.31x = 5,063.62 × 1,990.68
  4. Step 4: Simplify right side
    3,669.31x = 10,080,047.06
  5. Step 5: Solve for x
    x = 10,080,047.06/3,669.31
  6. Step 6: Final answer
    x = 2,747.12

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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.