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Finding the Fourth Proportional to 3,453.78, 5,180.13 and 1,505.46

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Solution

The fourth proportional to 3,453.78, 5,180.13 and 1,505.46 is: 2,257.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,453.78 : 5,180.13 = 1,505.46 : x
  2. Step 2: Convert to fraction form
    3,453.78/5,180.13 = 1,505.46/x
  3. Step 3: Cross multiply
    3,453.78x = 5,180.13 × 1,505.46
  4. Step 4: Simplify right side
    3,453.78x = 7,798,478.51
  5. Step 5: Solve for x
    x = 7,798,478.51/3,453.78
  6. Step 6: Final answer
    x = 2,257.95

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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.