Home / 1,382.22-1,907.68-1,089.70

Finding the Fourth Proportional to 1,382.22, 1,907.68 and 1,089.70

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Solution

The fourth proportional to 1,382.22, 1,907.68 and 1,089.70 is: 1,503.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.22 : 1,907.68 = 1,089.70 : x
  2. Step 2: Convert to fraction form
    1,382.22/1,907.68 = 1,089.70/x
  3. Step 3: Cross multiply
    1,382.22x = 1,907.68 × 1,089.70
  4. Step 4: Simplify right side
    1,382.22x = 2,078,798.90
  5. Step 5: Solve for x
    x = 2,078,798.90/1,382.22
  6. Step 6: Final answer
    x = 1,503.96

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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.