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Finding the Fourth Proportional to 892.65, 1,336.84 and 887.19

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Solution

The fourth proportional to 892.65, 1,336.84 and 887.19 is: 1,328.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.65 : 1,336.84 = 887.19 : x
  2. Step 2: Convert to fraction form
    892.65/1,336.84 = 887.19/x
  3. Step 3: Cross multiply
    892.65x = 1,336.84 × 887.19
  4. Step 4: Simplify right side
    892.65x = 1,186,023.85
  5. Step 5: Solve for x
    x = 1,186,023.85/892.65
  6. Step 6: Final answer
    x = 1,328.65

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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.