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Finding the Fourth Proportional to 2,170.92, 2,995.80 and 1,239.42

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Solution

The fourth proportional to 2,170.92, 2,995.80 and 1,239.42 is: 1,710.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.92 : 2,995.80 = 1,239.42 : x
  2. Step 2: Convert to fraction form
    2,170.92/2,995.80 = 1,239.42/x
  3. Step 3: Cross multiply
    2,170.92x = 2,995.80 × 1,239.42
  4. Step 4: Simplify right side
    2,170.92x = 3,713,054.44
  5. Step 5: Solve for x
    x = 3,713,054.44/2,170.92
  6. Step 6: Final answer
    x = 1,710.36

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.