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Finding the Fourth Proportional to 1,418.35, 1,956.64 and 850.90

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Solution

The fourth proportional to 1,418.35, 1,956.64 and 850.90 is: 1,173.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.35 : 1,956.64 = 850.90 : x
  2. Step 2: Convert to fraction form
    1,418.35/1,956.64 = 850.90/x
  3. Step 3: Cross multiply
    1,418.35x = 1,956.64 × 850.90
  4. Step 4: Simplify right side
    1,418.35x = 1,664,904.98
  5. Step 5: Solve for x
    x = 1,664,904.98/1,418.35
  6. Step 6: Final answer
    x = 1,173.83

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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.