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Finding the Fourth Proportional to 259.75, 389.52 and 95.20

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Solution

The fourth proportional to 259.75, 389.52 and 95.20 is: 142.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.75 : 389.52 = 95.20 : x
  2. Step 2: Convert to fraction form
    259.75/389.52 = 95.20/x
  3. Step 3: Cross multiply
    259.75x = 389.52 × 95.20
  4. Step 4: Simplify right side
    259.75x = 37,081.33
  5. Step 5: Solve for x
    x = 37,081.33/259.75
  6. Step 6: Final answer
    x = 142.76

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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.