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Finding the Fourth Proportional to 274.95, 379.43 and 155.32

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Solution

The fourth proportional to 274.95, 379.43 and 155.32 is: 214.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.95 : 379.43 = 155.32 : x
  2. Step 2: Convert to fraction form
    274.95/379.43 = 155.32/x
  3. Step 3: Cross multiply
    274.95x = 379.43 × 155.32
  4. Step 4: Simplify right side
    274.95x = 58,933.07
  5. Step 5: Solve for x
    x = 58,933.07/274.95
  6. Step 6: Final answer
    x = 214.34

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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.