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Finding the Fourth Proportional to 395.64, 546 and 248.16

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Solution

The fourth proportional to 395.64, 546 and 248.16 is: 342.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.64 : 546 = 248.16 : x
  2. Step 2: Convert to fraction form
    395.64/546 = 248.16/x
  3. Step 3: Cross multiply
    395.64x = 546 × 248.16
  4. Step 4: Simplify right side
    395.64x = 135,495.36
  5. Step 5: Solve for x
    x = 135,495.36/395.64
  6. Step 6: Final answer
    x = 342.47

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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.