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Finding the Fourth Proportional to 890.85, 1,336.32 and 274.97

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Solution

The fourth proportional to 890.85, 1,336.32 and 274.97 is: 412.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.85 : 1,336.32 = 274.97 : x
  2. Step 2: Convert to fraction form
    890.85/1,336.32 = 274.97/x
  3. Step 3: Cross multiply
    890.85x = 1,336.32 × 274.97
  4. Step 4: Simplify right side
    890.85x = 367,451.89
  5. Step 5: Solve for x
    x = 367,451.89/890.85
  6. Step 6: Final answer
    x = 412.47

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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.