Home / 3,478.85-5,218.91-1,399.01

Finding the Fourth Proportional to 3,478.85, 5,218.91 and 1,399.01

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Solution

The fourth proportional to 3,478.85, 5,218.91 and 1,399.01 is: 2,098.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.85 : 5,218.91 = 1,399.01 : x
  2. Step 2: Convert to fraction form
    3,478.85/5,218.91 = 1,399.01/x
  3. Step 3: Cross multiply
    3,478.85x = 5,218.91 × 1,399.01
  4. Step 4: Simplify right side
    3,478.85x = 7,301,274.19
  5. Step 5: Solve for x
    x = 7,301,274.19/3,478.85
  6. Step 6: Final answer
    x = 2,098.76

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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.