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Finding the Fourth Proportional to 427.20, 589.37 and 261.29

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Solution

The fourth proportional to 427.20, 589.37 and 261.29 is: 360.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.20 : 589.37 = 261.29 : x
  2. Step 2: Convert to fraction form
    427.20/589.37 = 261.29/x
  3. Step 3: Cross multiply
    427.20x = 589.37 × 261.29
  4. Step 4: Simplify right side
    427.20x = 153,992.23
  5. Step 5: Solve for x
    x = 153,992.23/427.20
  6. Step 6: Final answer
    x = 360.47

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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.