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Finding the Fourth Proportional to 1,954.92, 2,698.02 and 1,115.81

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Solution

The fourth proportional to 1,954.92, 2,698.02 and 1,115.81 is: 1,539.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,954.92 : 2,698.02 = 1,115.81 : x
  2. Step 2: Convert to fraction form
    1,954.92/2,698.02 = 1,115.81/x
  3. Step 3: Cross multiply
    1,954.92x = 2,698.02 × 1,115.81
  4. Step 4: Simplify right side
    1,954.92x = 3,010,464.21
  5. Step 5: Solve for x
    x = 3,010,464.21/1,954.92
  6. Step 6: Final answer
    x = 1,539.94

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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.