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Finding the Fourth Proportional to 2,810.98, 3,879.53 and 1,916.02

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Solution

The fourth proportional to 2,810.98, 3,879.53 and 1,916.02 is: 2,644.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.98 : 3,879.53 = 1,916.02 : x
  2. Step 2: Convert to fraction form
    2,810.98/3,879.53 = 1,916.02/x
  3. Step 3: Cross multiply
    2,810.98x = 3,879.53 × 1,916.02
  4. Step 4: Simplify right side
    2,810.98x = 7,433,251.24
  5. Step 5: Solve for x
    x = 7,433,251.24/2,810.98
  6. Step 6: Final answer
    x = 2,644.36

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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.