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Finding the Fourth Proportional to 3,881.68, 5,821.56 and 2,420.08

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Solution

The fourth proportional to 3,881.68, 5,821.56 and 2,420.08 is: 3,629.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.68 : 5,821.56 = 2,420.08 : x
  2. Step 2: Convert to fraction form
    3,881.68/5,821.56 = 2,420.08/x
  3. Step 3: Cross multiply
    3,881.68x = 5,821.56 × 2,420.08
  4. Step 4: Simplify right side
    3,881.68x = 14,088,640.92
  5. Step 5: Solve for x
    x = 14,088,640.92/3,881.68
  6. Step 6: Final answer
    x = 3,629.52

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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.