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Finding the Fourth Proportional to 405.26, 559.14 and 239.41

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Solution

The fourth proportional to 405.26, 559.14 and 239.41 is: 330.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.26 : 559.14 = 239.41 : x
  2. Step 2: Convert to fraction form
    405.26/559.14 = 239.41/x
  3. Step 3: Cross multiply
    405.26x = 559.14 × 239.41
  4. Step 4: Simplify right side
    405.26x = 133,863.51
  5. Step 5: Solve for x
    x = 133,863.51/405.26
  6. Step 6: Final answer
    x = 330.32

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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.