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Finding the Fourth Proportional to 5,389.65, 8,083.80 and 1,879.02

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Solution

The fourth proportional to 5,389.65, 8,083.80 and 1,879.02 is: 2,818.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,389.65 : 8,083.80 = 1,879.02 : x
  2. Step 2: Convert to fraction form
    5,389.65/8,083.80 = 1,879.02/x
  3. Step 3: Cross multiply
    5,389.65x = 8,083.80 × 1,879.02
  4. Step 4: Simplify right side
    5,389.65x = 15,189,621.88
  5. Step 5: Solve for x
    x = 15,189,621.88/5,389.65
  6. Step 6: Final answer
    x = 2,818.29

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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.