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Finding the Fourth Proportional to 3,885.62, 5,828.51 and 1,420.44

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Solution

The fourth proportional to 3,885.62, 5,828.51 and 1,420.44 is: 2,130.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.62 : 5,828.51 = 1,420.44 : x
  2. Step 2: Convert to fraction form
    3,885.62/5,828.51 = 1,420.44/x
  3. Step 3: Cross multiply
    3,885.62x = 5,828.51 × 1,420.44
  4. Step 4: Simplify right side
    3,885.62x = 8,279,022.45
  5. Step 5: Solve for x
    x = 8,279,022.45/3,885.62
  6. Step 6: Final answer
    x = 2,130.68

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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.