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Finding the Fourth Proportional to 272.12, 405.34 and 268.54

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Solution

The fourth proportional to 272.12, 405.34 and 268.54 is: 400.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.12 : 405.34 = 268.54 : x
  2. Step 2: Convert to fraction form
    272.12/405.34 = 268.54/x
  3. Step 3: Cross multiply
    272.12x = 405.34 × 268.54
  4. Step 4: Simplify right side
    272.12x = 108,848.32
  5. Step 5: Solve for x
    x = 108,848.32/272.12
  6. Step 6: Final answer
    x = 400.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.