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Finding the Fourth Proportional to 894.24, 1,231.20 and 845.64

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Solution

The fourth proportional to 894.24, 1,231.20 and 845.64 is: 1,164.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.24 : 1,231.20 = 845.64 : x
  2. Step 2: Convert to fraction form
    894.24/1,231.20 = 845.64/x
  3. Step 3: Cross multiply
    894.24x = 1,231.20 × 845.64
  4. Step 4: Simplify right side
    894.24x = 1,041,151.97
  5. Step 5: Solve for x
    x = 1,041,151.97/894.24
  6. Step 6: Final answer
    x = 1,164.29

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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.