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Finding the Fourth Proportional to 274.85, 379.26 and 156.84

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Solution

The fourth proportional to 274.85, 379.26 and 156.84 is: 216.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.85 : 379.26 = 156.84 : x
  2. Step 2: Convert to fraction form
    274.85/379.26 = 156.84/x
  3. Step 3: Cross multiply
    274.85x = 379.26 × 156.84
  4. Step 4: Simplify right side
    274.85x = 59,483.14
  5. Step 5: Solve for x
    x = 59,483.14/274.85
  6. Step 6: Final answer
    x = 216.42

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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.