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Finding the Fourth Proportional to 3,888, 5,817.42 and 2,420.28

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Solution

The fourth proportional to 3,888, 5,817.42 and 2,420.28 is: 3,621.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888 : 5,817.42 = 2,420.28 : x
  2. Step 2: Convert to fraction form
    3,888/5,817.42 = 2,420.28/x
  3. Step 3: Cross multiply
    3,888x = 5,817.42 × 2,420.28
  4. Step 4: Simplify right side
    3,888x = 14,079,785.28
  5. Step 5: Solve for x
    x = 14,079,785.28/3,888
  6. Step 6: Final answer
    x = 3,621.34

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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.