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Finding the Fourth Proportional to 386.00, 533.13 and 261.44

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Solution

The fourth proportional to 386.00, 533.13 and 261.44 is: 361.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.00 : 533.13 = 261.44 : x
  2. Step 2: Convert to fraction form
    386.00/533.13 = 261.44/x
  3. Step 3: Cross multiply
    386.00x = 533.13 × 261.44
  4. Step 4: Simplify right side
    386.00x = 139,383.49
  5. Step 5: Solve for x
    x = 139,383.49/386.00
  6. Step 6: Final answer
    x = 361.10

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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.