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Finding the Fourth Proportional to 273.21, 377.05 and 155.22

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Solution

The fourth proportional to 273.21, 377.05 and 155.22 is: 214.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.21 : 377.05 = 155.22 : x
  2. Step 2: Convert to fraction form
    273.21/377.05 = 155.22/x
  3. Step 3: Cross multiply
    273.21x = 377.05 × 155.22
  4. Step 4: Simplify right side
    273.21x = 58,525.70
  5. Step 5: Solve for x
    x = 58,525.70/273.21
  6. Step 6: Final answer
    x = 214.22

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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.