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Finding the Fourth Proportional to 3,558.68, 5,338.22 and 1,478.90

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Solution

The fourth proportional to 3,558.68, 5,338.22 and 1,478.90 is: 2,218.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,558.68 : 5,338.22 = 1,478.90 : x
  2. Step 2: Convert to fraction form
    3,558.68/5,338.22 = 1,478.90/x
  3. Step 3: Cross multiply
    3,558.68x = 5,338.22 × 1,478.90
  4. Step 4: Simplify right side
    3,558.68x = 7,894,665.02
  5. Step 5: Solve for x
    x = 7,894,665.02/3,558.68
  6. Step 6: Final answer
    x = 2,218.42

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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.