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Finding the Fourth Proportional to 273.28, 377.20 and 156.86

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Solution

The fourth proportional to 273.28, 377.20 and 156.86 is: 216.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.28 : 377.20 = 156.86 : x
  2. Step 2: Convert to fraction form
    273.28/377.20 = 156.86/x
  3. Step 3: Cross multiply
    273.28x = 377.20 × 156.86
  4. Step 4: Simplify right side
    273.28x = 59,167.59
  5. Step 5: Solve for x
    x = 59,167.59/273.28
  6. Step 6: Final answer
    x = 216.51

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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.