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Finding the Fourth Proportional to 891.14, 1,336.62 and 274.86

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Solution

The fourth proportional to 891.14, 1,336.62 and 274.86 is: 412.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.14 : 1,336.62 = 274.86 : x
  2. Step 2: Convert to fraction form
    891.14/1,336.62 = 274.86/x
  3. Step 3: Cross multiply
    891.14x = 1,336.62 × 274.86
  4. Step 4: Simplify right side
    891.14x = 367,383.37
  5. Step 5: Solve for x
    x = 367,383.37/891.14
  6. Step 6: Final answer
    x = 412.26

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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.