Home / 2,087.62-2,879.65-1,379.47

Finding the Fourth Proportional to 2,087.62, 2,879.65 and 1,379.47

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Solution

The fourth proportional to 2,087.62, 2,879.65 and 1,379.47 is: 1,902.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.62 : 2,879.65 = 1,379.47 : x
  2. Step 2: Convert to fraction form
    2,087.62/2,879.65 = 1,379.47/x
  3. Step 3: Cross multiply
    2,087.62x = 2,879.65 × 1,379.47
  4. Step 4: Simplify right side
    2,087.62x = 3,972,390.79
  5. Step 5: Solve for x
    x = 3,972,390.79/2,087.62
  6. Step 6: Final answer
    x = 1,902.83

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1.5x scale

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.