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Finding the Fourth Proportional to 1,955.54, 2,698.11 and 1,209.53

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Solution

The fourth proportional to 1,955.54, 2,698.11 and 1,209.53 is: 1,668.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,955.54 : 2,698.11 = 1,209.53 : x
  2. Step 2: Convert to fraction form
    1,955.54/2,698.11 = 1,209.53/x
  3. Step 3: Cross multiply
    1,955.54x = 2,698.11 × 1,209.53
  4. Step 4: Simplify right side
    1,955.54x = 3,263,451.73
  5. Step 5: Solve for x
    x = 3,263,451.73/1,955.54
  6. Step 6: Final answer
    x = 1,668.82

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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.