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Finding the Fourth Proportional to 386.49, 533.31 and 246.63

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Solution

The fourth proportional to 386.49, 533.31 and 246.63 is: 340.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.49 : 533.31 = 246.63 : x
  2. Step 2: Convert to fraction form
    386.49/533.31 = 246.63/x
  3. Step 3: Cross multiply
    386.49x = 533.31 × 246.63
  4. Step 4: Simplify right side
    386.49x = 131,530.25
  5. Step 5: Solve for x
    x = 131,530.25/386.49
  6. Step 6: Final answer
    x = 340.32

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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.