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Finding the Fourth Proportional to 353.36, 487.59 and 203.93

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Solution

The fourth proportional to 353.36, 487.59 and 203.93 is: 281.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.36 : 487.59 = 203.93 : x
  2. Step 2: Convert to fraction form
    353.36/487.59 = 203.93/x
  3. Step 3: Cross multiply
    353.36x = 487.59 × 203.93
  4. Step 4: Simplify right side
    353.36x = 99,431.79
  5. Step 5: Solve for x
    x = 99,431.79/353.36
  6. Step 6: Final answer
    x = 281.39

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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.