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Finding the Fourth Proportional to 261.39, 360.63 and 163.11

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Solution

The fourth proportional to 261.39, 360.63 and 163.11 is: 225.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.39 : 360.63 = 163.11 : x
  2. Step 2: Convert to fraction form
    261.39/360.63 = 163.11/x
  3. Step 3: Cross multiply
    261.39x = 360.63 × 163.11
  4. Step 4: Simplify right side
    261.39x = 58,822.36
  5. Step 5: Solve for x
    x = 58,822.36/261.39
  6. Step 6: Final answer
    x = 225.04

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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.