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Finding the Fourth Proportional to 1,403.91, 1,936.53 and 873.09

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Solution

The fourth proportional to 1,403.91, 1,936.53 and 873.09 is: 1,204.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.91 : 1,936.53 = 873.09 : x
  2. Step 2: Convert to fraction form
    1,403.91/1,936.53 = 873.09/x
  3. Step 3: Cross multiply
    1,403.91x = 1,936.53 × 873.09
  4. Step 4: Simplify right side
    1,403.91x = 1,690,764.98
  5. Step 5: Solve for x
    x = 1,690,764.98/1,403.91
  6. Step 6: Final answer
    x = 1,204.33

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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.