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Finding the Fourth Proportional to 248.13, 340.20 and 245.43

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Solution

The fourth proportional to 248.13, 340.20 and 245.43 is: 336.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.13 : 340.20 = 245.43 : x
  2. Step 2: Convert to fraction form
    248.13/340.20 = 245.43/x
  3. Step 3: Cross multiply
    248.13x = 340.20 × 245.43
  4. Step 4: Simplify right side
    248.13x = 83,495.29
  5. Step 5: Solve for x
    x = 83,495.29/248.13
  6. Step 6: Final answer
    x = 336.50

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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.