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Finding the Fourth Proportional to 386.12, 533.04 and 251.59

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Solution

The fourth proportional to 386.12, 533.04 and 251.59 is: 347.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.12 : 533.04 = 251.59 : x
  2. Step 2: Convert to fraction form
    386.12/533.04 = 251.59/x
  3. Step 3: Cross multiply
    386.12x = 533.04 × 251.59
  4. Step 4: Simplify right side
    386.12x = 134,107.53
  5. Step 5: Solve for x
    x = 134,107.53/386.12
  6. Step 6: Final answer
    x = 347.32

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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.