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Finding the Fourth Proportional to 248.35, 342.91 and 189.45

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Solution

The fourth proportional to 248.35, 342.91 and 189.45 is: 261.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.35 : 342.91 = 189.45 : x
  2. Step 2: Convert to fraction form
    248.35/342.91 = 189.45/x
  3. Step 3: Cross multiply
    248.35x = 342.91 × 189.45
  4. Step 4: Simplify right side
    248.35x = 64,964.30
  5. Step 5: Solve for x
    x = 64,964.30/248.35
  6. Step 6: Final answer
    x = 261.58

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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.