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Finding the Fourth Proportional to 326.44, 488.70 and 197.32

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Solution

The fourth proportional to 326.44, 488.70 and 197.32 is: 295.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.44 : 488.70 = 197.32 : x
  2. Step 2: Convert to fraction form
    326.44/488.70 = 197.32/x
  3. Step 3: Cross multiply
    326.44x = 488.70 × 197.32
  4. Step 4: Simplify right side
    326.44x = 96,430.28
  5. Step 5: Solve for x
    x = 96,430.28/326.44
  6. Step 6: Final answer
    x = 295.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.