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Finding the Fourth Proportional to 891.30, 1,336.94 and 336.12

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Solution

The fourth proportional to 891.30, 1,336.94 and 336.12 is: 504.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.30 : 1,336.94 = 336.12 : x
  2. Step 2: Convert to fraction form
    891.30/1,336.94 = 336.12/x
  3. Step 3: Cross multiply
    891.30x = 1,336.94 × 336.12
  4. Step 4: Simplify right side
    891.30x = 449,372.27
  5. Step 5: Solve for x
    x = 449,372.27/891.30
  6. Step 6: Final answer
    x = 504.18

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.