Home / 1,379.25-2,078.28-1,230.08

Finding the Fourth Proportional to 1,379.25, 2,078.28 and 1,230.08

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Solution

The fourth proportional to 1,379.25, 2,078.28 and 1,230.08 is: 1,853.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.25 : 2,078.28 = 1,230.08 : x
  2. Step 2: Convert to fraction form
    1,379.25/2,078.28 = 1,230.08/x
  3. Step 3: Cross multiply
    1,379.25x = 2,078.28 × 1,230.08
  4. Step 4: Simplify right side
    1,379.25x = 2,556,440.27
  5. Step 5: Solve for x
    x = 2,556,440.27/1,379.25
  6. Step 6: Final answer
    x = 1,853.50

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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.