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Finding the Fourth Proportional to 1,954.88, 2,698.01 and 1,208.79

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Solution

The fourth proportional to 1,954.88, 2,698.01 and 1,208.79 is: 1,668.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,954.88 : 2,698.01 = 1,208.79 : x
  2. Step 2: Convert to fraction form
    1,954.88/2,698.01 = 1,208.79/x
  3. Step 3: Cross multiply
    1,954.88x = 2,698.01 × 1,208.79
  4. Step 4: Simplify right side
    1,954.88x = 3,261,330.53
  5. Step 5: Solve for x
    x = 3,261,330.53/1,954.88
  6. Step 6: Final answer
    x = 1,668.31

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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.