Home / 1,379.19-2,079.12-1,287.54

Finding the Fourth Proportional to 1,379.19, 2,079.12 and 1,287.54

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Solution

The fourth proportional to 1,379.19, 2,079.12 and 1,287.54 is: 1,940.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.19 : 2,079.12 = 1,287.54 : x
  2. Step 2: Convert to fraction form
    1,379.19/2,079.12 = 1,287.54/x
  3. Step 3: Cross multiply
    1,379.19x = 2,079.12 × 1,287.54
  4. Step 4: Simplify right side
    1,379.19x = 2,676,950.16
  5. Step 5: Solve for x
    x = 2,676,950.16/1,379.19
  6. Step 6: Final answer
    x = 1,940.96

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.