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Finding the Fourth Proportional to 1,369.12, 2,061 and 1,228

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Solution

The fourth proportional to 1,369.12, 2,061 and 1,228 is: 1,848.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.12 : 2,061 = 1,228 : x
  2. Step 2: Convert to fraction form
    1,369.12/2,061 = 1,228/x
  3. Step 3: Cross multiply
    1,369.12x = 2,061 × 1,228
  4. Step 4: Simplify right side
    1,369.12x = 2,530,908
  5. Step 5: Solve for x
    x = 2,530,908/1,369.12
  6. Step 6: Final answer
    x = 1,848.57

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These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.