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Finding the Fourth Proportional to 261.60, 361.05 and 151.06

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Solution

The fourth proportional to 261.60, 361.05 and 151.06 is: 208.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.60 : 361.05 = 151.06 : x
  2. Step 2: Convert to fraction form
    261.60/361.05 = 151.06/x
  3. Step 3: Cross multiply
    261.60x = 361.05 × 151.06
  4. Step 4: Simplify right side
    261.60x = 54,540.21
  5. Step 5: Solve for x
    x = 54,540.21/261.60
  6. Step 6: Final answer
    x = 208.49

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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.