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Finding the Fourth Proportional to 3,642.54, 5,455.46 and 2,178.68

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Solution

The fourth proportional to 3,642.54, 5,455.46 and 2,178.68 is: 3,263.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,642.54 : 5,455.46 = 2,178.68 : x
  2. Step 2: Convert to fraction form
    3,642.54/5,455.46 = 2,178.68/x
  3. Step 3: Cross multiply
    3,642.54x = 5,455.46 × 2,178.68
  4. Step 4: Simplify right side
    3,642.54x = 11,885,701.59
  5. Step 5: Solve for x
    x = 11,885,701.59/3,642.54
  6. Step 6: Final answer
    x = 3,263.03

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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.