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Finding the Fourth Proportional to 272.76, 376.42 and 156.36

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Solution

The fourth proportional to 272.76, 376.42 and 156.36 is: 215.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.76 : 376.42 = 156.36 : x
  2. Step 2: Convert to fraction form
    272.76/376.42 = 156.36/x
  3. Step 3: Cross multiply
    272.76x = 376.42 × 156.36
  4. Step 4: Simplify right side
    272.76x = 58,857.03
  5. Step 5: Solve for x
    x = 58,857.03/272.76
  6. Step 6: Final answer
    x = 215.78

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.