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Finding the Fourth Proportional to 273.48, 377.40 and 155.43

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Solution

The fourth proportional to 273.48, 377.40 and 155.43 is: 214.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.48 : 377.40 = 155.43 : x
  2. Step 2: Convert to fraction form
    273.48/377.40 = 155.43/x
  3. Step 3: Cross multiply
    273.48x = 377.40 × 155.43
  4. Step 4: Simplify right side
    273.48x = 58,659.28
  5. Step 5: Solve for x
    x = 58,659.28/273.48
  6. Step 6: Final answer
    x = 214.49

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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.