Home / 1,260.08-1,890.44-394.40

Finding the Fourth Proportional to 1,260.08, 1,890.44 and 394.40

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Solution

The fourth proportional to 1,260.08, 1,890.44 and 394.40 is: 591.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.08 : 1,890.44 = 394.40 : x
  2. Step 2: Convert to fraction form
    1,260.08/1,890.44 = 394.40/x
  3. Step 3: Cross multiply
    1,260.08x = 1,890.44 × 394.40
  4. Step 4: Simplify right side
    1,260.08x = 745,589.54
  5. Step 5: Solve for x
    x = 745,589.54/1,260.08
  6. Step 6: Final answer
    x = 591.70

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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.