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Finding the Fourth Proportional to 259.86, 358.56 and 197.68

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Solution

The fourth proportional to 259.86, 358.56 and 197.68 is: 272.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.86 : 358.56 = 197.68 : x
  2. Step 2: Convert to fraction form
    259.86/358.56 = 197.68/x
  3. Step 3: Cross multiply
    259.86x = 358.56 × 197.68
  4. Step 4: Simplify right side
    259.86x = 70,880.14
  5. Step 5: Solve for x
    x = 70,880.14/259.86
  6. Step 6: Final answer
    x = 272.76

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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.