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Finding the Fourth Proportional to 1,995.16, 2,753.57 and 1,209.21

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Solution

The fourth proportional to 1,995.16, 2,753.57 and 1,209.21 is: 1,668.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,995.16 : 2,753.57 = 1,209.21 : x
  2. Step 2: Convert to fraction form
    1,995.16/2,753.57 = 1,209.21/x
  3. Step 3: Cross multiply
    1,995.16x = 2,753.57 × 1,209.21
  4. Step 4: Simplify right side
    1,995.16x = 3,329,624.57
  5. Step 5: Solve for x
    x = 3,329,624.57/1,995.16
  6. Step 6: Final answer
    x = 1,668.85

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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.