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Finding the Fourth Proportional to 896.40, 1,236.84 and 674.85

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Solution

The fourth proportional to 896.40, 1,236.84 and 674.85 is: 931.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.40 : 1,236.84 = 674.85 : x
  2. Step 2: Convert to fraction form
    896.40/1,236.84 = 674.85/x
  3. Step 3: Cross multiply
    896.40x = 1,236.84 × 674.85
  4. Step 4: Simplify right side
    896.40x = 834,681.47
  5. Step 5: Solve for x
    x = 834,681.47/896.40
  6. Step 6: Final answer
    x = 931.15

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Double scale
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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.