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Finding the Fourth Proportional to 248.60, 340.99 and 247.40

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Solution

The fourth proportional to 248.60, 340.99 and 247.40 is: 339.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.60 : 340.99 = 247.40 : x
  2. Step 2: Convert to fraction form
    248.60/340.99 = 247.40/x
  3. Step 3: Cross multiply
    248.60x = 340.99 × 247.40
  4. Step 4: Simplify right side
    248.60x = 84,360.93
  5. Step 5: Solve for x
    x = 84,360.93/248.60
  6. Step 6: Final answer
    x = 339.34

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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.