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Finding the Fourth Proportional to 3,318.48, 4,978.53 and 1,371.24

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Solution

The fourth proportional to 3,318.48, 4,978.53 and 1,371.24 is: 2,057.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.48 : 4,978.53 = 1,371.24 : x
  2. Step 2: Convert to fraction form
    3,318.48/4,978.53 = 1,371.24/x
  3. Step 3: Cross multiply
    3,318.48x = 4,978.53 × 1,371.24
  4. Step 4: Simplify right side
    3,318.48x = 6,826,759.48
  5. Step 5: Solve for x
    x = 6,826,759.48/3,318.48
  6. Step 6: Final answer
    x = 2,057.19

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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.