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Finding the Fourth Proportional to 1,135.95, 1,692.80 and 1,104.28

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Solution

The fourth proportional to 1,135.95, 1,692.80 and 1,104.28 is: 1,645.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.95 : 1,692.80 = 1,104.28 : x
  2. Step 2: Convert to fraction form
    1,135.95/1,692.80 = 1,104.28/x
  3. Step 3: Cross multiply
    1,135.95x = 1,692.80 × 1,104.28
  4. Step 4: Simplify right side
    1,135.95x = 1,869,329.09
  5. Step 5: Solve for x
    x = 1,869,329.09/1,135.95
  6. Step 6: Final answer
    x = 1,645.61

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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.