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Finding the Fourth Proportional to 353.42, 487.36 and 235.36

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Solution

The fourth proportional to 353.42, 487.36 and 235.36 is: 324.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.42 : 487.36 = 235.36 : x
  2. Step 2: Convert to fraction form
    353.42/487.36 = 235.36/x
  3. Step 3: Cross multiply
    353.42x = 487.36 × 235.36
  4. Step 4: Simplify right side
    353.42x = 114,705.05
  5. Step 5: Solve for x
    x = 114,705.05/353.42
  6. Step 6: Final answer
    x = 324.56

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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.