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Finding the Fourth Proportional to 3,881.63, 5,356.67 and 2,309.63

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Solution

The fourth proportional to 3,881.63, 5,356.67 and 2,309.63 is: 3,187.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.63 : 5,356.67 = 2,309.63 : x
  2. Step 2: Convert to fraction form
    3,881.63/5,356.67 = 2,309.63/x
  3. Step 3: Cross multiply
    3,881.63x = 5,356.67 × 2,309.63
  4. Step 4: Simplify right side
    3,881.63x = 12,371,887.40
  5. Step 5: Solve for x
    x = 12,371,887.40/3,881.63
  6. Step 6: Final answer
    x = 3,187.29

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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.