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Finding the Fourth Proportional to 405.27, 559.22 and 272.61

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Solution

The fourth proportional to 405.27, 559.22 and 272.61 is: 376.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.27 : 559.22 = 272.61 : x
  2. Step 2: Convert to fraction form
    405.27/559.22 = 272.61/x
  3. Step 3: Cross multiply
    405.27x = 559.22 × 272.61
  4. Step 4: Simplify right side
    405.27x = 152,447.60
  5. Step 5: Solve for x
    x = 152,447.60/405.27
  6. Step 6: Final answer
    x = 376.16

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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.