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Finding the Fourth Proportional to 261.77, 361.25 and 145.33

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Solution

The fourth proportional to 261.77, 361.25 and 145.33 is: 200.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.77 : 361.25 = 145.33 : x
  2. Step 2: Convert to fraction form
    261.77/361.25 = 145.33/x
  3. Step 3: Cross multiply
    261.77x = 361.25 × 145.33
  4. Step 4: Simplify right side
    261.77x = 52,500.46
  5. Step 5: Solve for x
    x = 52,500.46/261.77
  6. Step 6: Final answer
    x = 200.56

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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.