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Finding the Fourth Proportional to 3,518.87, 5,278.89 and 1,439.99

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Solution

The fourth proportional to 3,518.87, 5,278.89 and 1,439.99 is: 2,160.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,518.87 : 5,278.89 = 1,439.99 : x
  2. Step 2: Convert to fraction form
    3,518.87/5,278.89 = 1,439.99/x
  3. Step 3: Cross multiply
    3,518.87x = 5,278.89 × 1,439.99
  4. Step 4: Simplify right side
    3,518.87x = 7,601,548.81
  5. Step 5: Solve for x
    x = 7,601,548.81/3,518.87
  6. Step 6: Final answer
    x = 2,160.22

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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.