Home / 3,620-5,429.36-1,022.40

Finding the Fourth Proportional to 3,620, 5,429.36 and 1,022.40

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Solution

The fourth proportional to 3,620, 5,429.36 and 1,022.40 is: 1,533.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620 : 5,429.36 = 1,022.40 : x
  2. Step 2: Convert to fraction form
    3,620/5,429.36 = 1,022.40/x
  3. Step 3: Cross multiply
    3,620x = 5,429.36 × 1,022.40
  4. Step 4: Simplify right side
    3,620x = 5,550,977.66
  5. Step 5: Solve for x
    x = 5,550,977.66/3,620
  6. Step 6: Final answer
    x = 1,533.42

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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.