Home / 1,879.08-2,812.70-1,290.65

Finding the Fourth Proportional to 1,879.08, 2,812.70 and 1,290.65

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Solution

The fourth proportional to 1,879.08, 2,812.70 and 1,290.65 is: 1,931.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,879.08 : 2,812.70 = 1,290.65 : x
  2. Step 2: Convert to fraction form
    1,879.08/2,812.70 = 1,290.65/x
  3. Step 3: Cross multiply
    1,879.08x = 2,812.70 × 1,290.65
  4. Step 4: Simplify right side
    1,879.08x = 3,630,190.74
  5. Step 5: Solve for x
    x = 3,630,190.74/1,879.08
  6. Step 6: Final answer
    x = 1,931.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.