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Finding the Fourth Proportional to 3,453.51, 5,179.68 and 988.05

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Solution

The fourth proportional to 3,453.51, 5,179.68 and 988.05 is: 1,481.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,453.51 : 5,179.68 = 988.05 : x
  2. Step 2: Convert to fraction form
    3,453.51/5,179.68 = 988.05/x
  3. Step 3: Cross multiply
    3,453.51x = 5,179.68 × 988.05
  4. Step 4: Simplify right side
    3,453.51x = 5,117,782.82
  5. Step 5: Solve for x
    x = 5,117,782.82/3,453.51
  6. Step 6: Final answer
    x = 1,481.91

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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.