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Finding the Fourth Proportional to 258.72, 389.64 and 195.04

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Solution

The fourth proportional to 258.72, 389.64 and 195.04 is: 293.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.72 : 389.64 = 195.04 : x
  2. Step 2: Convert to fraction form
    258.72/389.64 = 195.04/x
  3. Step 3: Cross multiply
    258.72x = 389.64 × 195.04
  4. Step 4: Simplify right side
    258.72x = 75,995.39
  5. Step 5: Solve for x
    x = 75,995.39/258.72
  6. Step 6: Final answer
    x = 293.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.