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Finding the Fourth Proportional to 231.08, 318.68 and 197.60

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Solution

The fourth proportional to 231.08, 318.68 and 197.60 is: 272.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.08 : 318.68 = 197.60 : x
  2. Step 2: Convert to fraction form
    231.08/318.68 = 197.60/x
  3. Step 3: Cross multiply
    231.08x = 318.68 × 197.60
  4. Step 4: Simplify right side
    231.08x = 62,968.59
  5. Step 5: Solve for x
    x = 62,968.59/231.08
  6. Step 6: Final answer
    x = 272.50

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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.