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Finding the Fourth Proportional to 274.88, 379.35 and 156.83

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Solution

The fourth proportional to 274.88, 379.35 and 156.83 is: 216.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.88 : 379.35 = 156.83 : x
  2. Step 2: Convert to fraction form
    274.88/379.35 = 156.83/x
  3. Step 3: Cross multiply
    274.88x = 379.35 × 156.83
  4. Step 4: Simplify right side
    274.88x = 59,491.56
  5. Step 5: Solve for x
    x = 59,491.56/274.88
  6. Step 6: Final answer
    x = 216.43

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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.