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Finding the Fourth Proportional to 261.95, 361.49 and 151.43

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Solution

The fourth proportional to 261.95, 361.49 and 151.43 is: 208.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.95 : 361.49 = 151.43 : x
  2. Step 2: Convert to fraction form
    261.95/361.49 = 151.43/x
  3. Step 3: Cross multiply
    261.95x = 361.49 × 151.43
  4. Step 4: Simplify right side
    261.95x = 54,737.87
  5. Step 5: Solve for x
    x = 54,737.87/261.95
  6. Step 6: Final answer
    x = 208.97

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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.