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Finding the Fourth Proportional to 1,078.82, 1,609.36 and 1,040.95

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Solution

The fourth proportional to 1,078.82, 1,609.36 and 1,040.95 is: 1,552.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.82 : 1,609.36 = 1,040.95 : x
  2. Step 2: Convert to fraction form
    1,078.82/1,609.36 = 1,040.95/x
  3. Step 3: Cross multiply
    1,078.82x = 1,609.36 × 1,040.95
  4. Step 4: Simplify right side
    1,078.82x = 1,675,250.04
  5. Step 5: Solve for x
    x = 1,675,250.04/1,078.82
  6. Step 6: Final answer
    x = 1,552.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.