Home / 1,260.26-1,890.40-394.60

Finding the Fourth Proportional to 1,260.26, 1,890.40 and 394.60

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Solution

The fourth proportional to 1,260.26, 1,890.40 and 394.60 is: 591.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.26 : 1,890.40 = 394.60 : x
  2. Step 2: Convert to fraction form
    1,260.26/1,890.40 = 394.60/x
  3. Step 3: Cross multiply
    1,260.26x = 1,890.40 × 394.60
  4. Step 4: Simplify right side
    1,260.26x = 745,951.84
  5. Step 5: Solve for x
    x = 745,951.84/1,260.26
  6. Step 6: Final answer
    x = 591.90

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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.