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Finding the Fourth Proportional to 261.21, 360.47 and 163.02

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Solution

The fourth proportional to 261.21, 360.47 and 163.02 is: 224.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.21 : 360.47 = 163.02 : x
  2. Step 2: Convert to fraction form
    261.21/360.47 = 163.02/x
  3. Step 3: Cross multiply
    261.21x = 360.47 × 163.02
  4. Step 4: Simplify right side
    261.21x = 58,765.58
  5. Step 5: Solve for x
    x = 58,765.58/261.21
  6. Step 6: Final answer
    x = 224.97

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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.