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Finding the Fourth Proportional to 259.39, 391.52 and 259.39

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Solution

The fourth proportional to 259.39, 391.52 and 259.39 is: 391.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.39 : 391.52 = 259.39 : x
  2. Step 2: Convert to fraction form
    259.39/391.52 = 259.39/x
  3. Step 3: Cross multiply
    259.39x = 391.52 × 259.39
  4. Step 4: Simplify right side
    259.39x = 101,556.37
  5. Step 5: Solve for x
    x = 101,556.37/259.39
  6. Step 6: Final answer
    x = 391.52

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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.