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Finding the Fourth Proportional to 1,954.12, 2,934.54 and 1,939

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Solution

The fourth proportional to 1,954.12, 2,934.54 and 1,939 is: 2,911.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,954.12 : 2,934.54 = 1,939 : x
  2. Step 2: Convert to fraction form
    1,954.12/2,934.54 = 1,939/x
  3. Step 3: Cross multiply
    1,954.12x = 2,934.54 × 1,939
  4. Step 4: Simplify right side
    1,954.12x = 5,690,073.06
  5. Step 5: Solve for x
    x = 5,690,073.06/1,954.12
  6. Step 6: Final answer
    x = 2,911.83

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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.