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Finding the Fourth Proportional to 281.09, 420.91 and 235.32

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Solution

The fourth proportional to 281.09, 420.91 and 235.32 is: 352.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.09 : 420.91 = 235.32 : x
  2. Step 2: Convert to fraction form
    281.09/420.91 = 235.32/x
  3. Step 3: Cross multiply
    281.09x = 420.91 × 235.32
  4. Step 4: Simplify right side
    281.09x = 99,048.54
  5. Step 5: Solve for x
    x = 99,048.54/281.09
  6. Step 6: Final answer
    x = 352.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.