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Finding the Fourth Proportional to 1,968.81, 2,950.24 and 1,187.94

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Solution

The fourth proportional to 1,968.81, 2,950.24 and 1,187.94 is: 1,780.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,968.81 : 2,950.24 = 1,187.94 : x
  2. Step 2: Convert to fraction form
    1,968.81/2,950.24 = 1,187.94/x
  3. Step 3: Cross multiply
    1,968.81x = 2,950.24 × 1,187.94
  4. Step 4: Simplify right side
    1,968.81x = 3,504,708.11
  5. Step 5: Solve for x
    x = 3,504,708.11/1,968.81
  6. Step 6: Final answer
    x = 1,780.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.