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Finding the Fourth Proportional to 395.85, 546.47 and 248.63

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Solution

The fourth proportional to 395.85, 546.47 and 248.63 is: 343.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.85 : 546.47 = 248.63 : x
  2. Step 2: Convert to fraction form
    395.85/546.47 = 248.63/x
  3. Step 3: Cross multiply
    395.85x = 546.47 × 248.63
  4. Step 4: Simplify right side
    395.85x = 135,864.86
  5. Step 5: Solve for x
    x = 135,864.86/395.85
  6. Step 6: Final answer
    x = 343.23

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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.