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Finding the Fourth Proportional to 261.53, 360.86 and 163.32

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Solution

The fourth proportional to 261.53, 360.86 and 163.32 is: 225.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.53 : 360.86 = 163.32 : x
  2. Step 2: Convert to fraction form
    261.53/360.86 = 163.32/x
  3. Step 3: Cross multiply
    261.53x = 360.86 × 163.32
  4. Step 4: Simplify right side
    261.53x = 58,933.49
  5. Step 5: Solve for x
    x = 58,933.49/261.53
  6. Step 6: Final answer
    x = 225.34

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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.