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Finding the Fourth Proportional to 353.14, 487.35 and 197.86

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Solution

The fourth proportional to 353.14, 487.35 and 197.86 is: 273.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.14 : 487.35 = 197.86 : x
  2. Step 2: Convert to fraction form
    353.14/487.35 = 197.86/x
  3. Step 3: Cross multiply
    353.14x = 487.35 × 197.86
  4. Step 4: Simplify right side
    353.14x = 96,427.07
  5. Step 5: Solve for x
    x = 96,427.07/353.14
  6. Step 6: Final answer
    x = 273.06

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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.