Home / 1,260.19-1,890.69-611.38

Finding the Fourth Proportional to 1,260.19, 1,890.69 and 611.38

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Solution

The fourth proportional to 1,260.19, 1,890.69 and 611.38 is: 917.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.19 : 1,890.69 = 611.38 : x
  2. Step 2: Convert to fraction form
    1,260.19/1,890.69 = 611.38/x
  3. Step 3: Cross multiply
    1,260.19x = 1,890.69 × 611.38
  4. Step 4: Simplify right side
    1,260.19x = 1,155,930.05
  5. Step 5: Solve for x
    x = 1,155,930.05/1,260.19
  6. Step 6: Final answer
    x = 917.27

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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.