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Finding the Fourth Proportional to 1,369.95, 1,891.58 and 1,054.73

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Solution

The fourth proportional to 1,369.95, 1,891.58 and 1,054.73 is: 1,456.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.95 : 1,891.58 = 1,054.73 : x
  2. Step 2: Convert to fraction form
    1,369.95/1,891.58 = 1,054.73/x
  3. Step 3: Cross multiply
    1,369.95x = 1,891.58 × 1,054.73
  4. Step 4: Simplify right side
    1,369.95x = 1,995,091.44
  5. Step 5: Solve for x
    x = 1,995,091.44/1,369.95
  6. Step 6: Final answer
    x = 1,456.32

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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.