Home / 1,389.27-1,907.15-1,192.44

Finding the Fourth Proportional to 1,389.27, 1,907.15 and 1,192.44

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Solution

The fourth proportional to 1,389.27, 1,907.15 and 1,192.44 is: 1,636.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.27 : 1,907.15 = 1,192.44 : x
  2. Step 2: Convert to fraction form
    1,389.27/1,907.15 = 1,192.44/x
  3. Step 3: Cross multiply
    1,389.27x = 1,907.15 × 1,192.44
  4. Step 4: Simplify right side
    1,389.27x = 2,274,161.95
  5. Step 5: Solve for x
    x = 2,274,161.95/1,389.27
  6. Step 6: Final answer
    x = 1,636.95

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.