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Finding the Fourth Proportional to 274.81, 379.22 and 156.77

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Solution

The fourth proportional to 274.81, 379.22 and 156.77 is: 216.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.81 : 379.22 = 156.77 : x
  2. Step 2: Convert to fraction form
    274.81/379.22 = 156.77/x
  3. Step 3: Cross multiply
    274.81x = 379.22 × 156.77
  4. Step 4: Simplify right side
    274.81x = 59,451.66
  5. Step 5: Solve for x
    x = 59,451.66/274.81
  6. Step 6: Final answer
    x = 216.34

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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.