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Finding the Fourth Proportional to 896.66, 1,236.21 and 684.33

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Solution

The fourth proportional to 896.66, 1,236.21 and 684.33 is: 943.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.66 : 1,236.21 = 684.33 : x
  2. Step 2: Convert to fraction form
    896.66/1,236.21 = 684.33/x
  3. Step 3: Cross multiply
    896.66x = 1,236.21 × 684.33
  4. Step 4: Simplify right side
    896.66x = 845,975.59
  5. Step 5: Solve for x
    x = 845,975.59/896.66
  6. Step 6: Final answer
    x = 943.48

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1.5x scale

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.