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Finding the Fourth Proportional to 892.83, 1,336.41 and 858.81

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Solution

The fourth proportional to 892.83, 1,336.41 and 858.81 is: 1,285.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.83 : 1,336.41 = 858.81 : x
  2. Step 2: Convert to fraction form
    892.83/1,336.41 = 858.81/x
  3. Step 3: Cross multiply
    892.83x = 1,336.41 × 858.81
  4. Step 4: Simplify right side
    892.83x = 1,147,722.27
  5. Step 5: Solve for x
    x = 1,147,722.27/892.83
  6. Step 6: Final answer
    x = 1,285.49

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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.