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Finding the Fourth Proportional to 261.92, 361.43 and 145.48

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Solution

The fourth proportional to 261.92, 361.43 and 145.48 is: 200.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.92 : 361.43 = 145.48 : x
  2. Step 2: Convert to fraction form
    261.92/361.43 = 145.48/x
  3. Step 3: Cross multiply
    261.92x = 361.43 × 145.48
  4. Step 4: Simplify right side
    261.92x = 52,580.11
  5. Step 5: Solve for x
    x = 52,580.11/261.92
  6. Step 6: Final answer
    x = 200.75

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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.