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Finding the Fourth Proportional to 274.87, 379.30 and 156.83

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Solution

The fourth proportional to 274.87, 379.30 and 156.83 is: 216.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.87 : 379.30 = 156.83 : x
  2. Step 2: Convert to fraction form
    274.87/379.30 = 156.83/x
  3. Step 3: Cross multiply
    274.87x = 379.30 × 156.83
  4. Step 4: Simplify right side
    274.87x = 59,483.33
  5. Step 5: Solve for x
    x = 59,483.33/274.87
  6. Step 6: Final answer
    x = 216.41

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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.