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Finding the Fourth Proportional to 261.90, 361.50 and 163.74

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Solution

The fourth proportional to 261.90, 361.50 and 163.74 is: 226.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.90 : 361.50 = 163.74 : x
  2. Step 2: Convert to fraction form
    261.90/361.50 = 163.74/x
  3. Step 3: Cross multiply
    261.90x = 361.50 × 163.74
  4. Step 4: Simplify right side
    261.90x = 59,192.01
  5. Step 5: Solve for x
    x = 59,192.01/261.90
  6. Step 6: Final answer
    x = 226.01

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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.