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Finding the Fourth Proportional to 386.91, 533.88 and 246.98

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Solution

The fourth proportional to 386.91, 533.88 and 246.98 is: 340.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.91 : 533.88 = 246.98 : x
  2. Step 2: Convert to fraction form
    386.91/533.88 = 246.98/x
  3. Step 3: Cross multiply
    386.91x = 533.88 × 246.98
  4. Step 4: Simplify right side
    386.91x = 131,855.01
  5. Step 5: Solve for x
    x = 131,855.01/386.91
  6. Step 6: Final answer
    x = 340.79

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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.