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Finding the Fourth Proportional to 894.36, 1,234.02 and 684.78

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Solution

The fourth proportional to 894.36, 1,234.02 and 684.78 is: 944.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.36 : 1,234.02 = 684.78 : x
  2. Step 2: Convert to fraction form
    894.36/1,234.02 = 684.78/x
  3. Step 3: Cross multiply
    894.36x = 1,234.02 × 684.78
  4. Step 4: Simplify right side
    894.36x = 845,032.22
  5. Step 5: Solve for x
    x = 845,032.22/894.36
  6. Step 6: Final answer
    x = 944.85

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Double scale
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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.