Home / 1,260.40-1,890.60-480.22

Finding the Fourth Proportional to 1,260.40, 1,890.60 and 480.22

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Solution

The fourth proportional to 1,260.40, 1,890.60 and 480.22 is: 720.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.40 : 1,890.60 = 480.22 : x
  2. Step 2: Convert to fraction form
    1,260.40/1,890.60 = 480.22/x
  3. Step 3: Cross multiply
    1,260.40x = 1,890.60 × 480.22
  4. Step 4: Simplify right side
    1,260.40x = 907,903.93
  5. Step 5: Solve for x
    x = 907,903.93/1,260.40
  6. Step 6: Final answer
    x = 720.33

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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.