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Finding the Fourth Proportional to 1,958.19, 2,702.30 and 1,212

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Solution

The fourth proportional to 1,958.19, 2,702.30 and 1,212 is: 1,672.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.19 : 2,702.30 = 1,212 : x
  2. Step 2: Convert to fraction form
    1,958.19/2,702.30 = 1,212/x
  3. Step 3: Cross multiply
    1,958.19x = 2,702.30 × 1,212
  4. Step 4: Simplify right side
    1,958.19x = 3,275,181.54
  5. Step 5: Solve for x
    x = 3,275,181.54/1,958.19
  6. Step 6: Final answer
    x = 1,672.56

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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.