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Finding the Fourth Proportional to 259.24, 357.54 and 220.84

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Solution

The fourth proportional to 259.24, 357.54 and 220.84 is: 304.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.24 : 357.54 = 220.84 : x
  2. Step 2: Convert to fraction form
    259.24/357.54 = 220.84/x
  3. Step 3: Cross multiply
    259.24x = 357.54 × 220.84
  4. Step 4: Simplify right side
    259.24x = 78,959.13
  5. Step 5: Solve for x
    x = 78,959.13/259.24
  6. Step 6: Final answer
    x = 304.58

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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.