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Finding the Fourth Proportional to 2,639.16, 3,639.06 and 1,973.88

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Solution

The fourth proportional to 2,639.16, 3,639.06 and 1,973.88 is: 2,721.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.16 : 3,639.06 = 1,973.88 : x
  2. Step 2: Convert to fraction form
    2,639.16/3,639.06 = 1,973.88/x
  3. Step 3: Cross multiply
    2,639.16x = 3,639.06 × 1,973.88
  4. Step 4: Simplify right side
    2,639.16x = 7,183,067.75
  5. Step 5: Solve for x
    x = 7,183,067.75/2,639.16
  6. Step 6: Final answer
    x = 2,721.73

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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.