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Finding the Fourth Proportional to 894.55, 1,231.67 and 812.54

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Solution

The fourth proportional to 894.55, 1,231.67 and 812.54 is: 1,118.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.55 : 1,231.67 = 812.54 : x
  2. Step 2: Convert to fraction form
    894.55/1,231.67 = 812.54/x
  3. Step 3: Cross multiply
    894.55x = 1,231.67 × 812.54
  4. Step 4: Simplify right side
    894.55x = 1,000,770.92
  5. Step 5: Solve for x
    x = 1,000,770.92/894.55
  6. Step 6: Final answer
    x = 1,118.74

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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.