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Finding the Fourth Proportional to 248.70, 340.70 and 239.46

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Solution

The fourth proportional to 248.70, 340.70 and 239.46 is: 328.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.70 : 340.70 = 239.46 : x
  2. Step 2: Convert to fraction form
    248.70/340.70 = 239.46/x
  3. Step 3: Cross multiply
    248.70x = 340.70 × 239.46
  4. Step 4: Simplify right side
    248.70x = 81,584.02
  5. Step 5: Solve for x
    x = 81,584.02/248.70
  6. Step 6: Final answer
    x = 328.04

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.