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Finding the Fourth Proportional to 259.42, 357.96 and 220.54

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Solution

The fourth proportional to 259.42, 357.96 and 220.54 is: 304.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.42 : 357.96 = 220.54 : x
  2. Step 2: Convert to fraction form
    259.42/357.96 = 220.54/x
  3. Step 3: Cross multiply
    259.42x = 357.96 × 220.54
  4. Step 4: Simplify right side
    259.42x = 78,944.50
  5. Step 5: Solve for x
    x = 78,944.50/259.42
  6. Step 6: Final answer
    x = 304.31

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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.