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Finding the Fourth Proportional to 386.42, 533.30 and 246.66

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Solution

The fourth proportional to 386.42, 533.30 and 246.66 is: 340.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.42 : 533.30 = 246.66 : x
  2. Step 2: Convert to fraction form
    386.42/533.30 = 246.66/x
  3. Step 3: Cross multiply
    386.42x = 533.30 × 246.66
  4. Step 4: Simplify right side
    386.42x = 131,542.54
  5. Step 5: Solve for x
    x = 131,542.54/386.42
  6. Step 6: Final answer
    x = 340.42

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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.