Home / 1,260.12-1,890.18-394.50

Finding the Fourth Proportional to 1,260.12, 1,890.18 and 394.50

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Solution

The fourth proportional to 1,260.12, 1,890.18 and 394.50 is: 591.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.12 : 1,890.18 = 394.50 : x
  2. Step 2: Convert to fraction form
    1,260.12/1,890.18 = 394.50/x
  3. Step 3: Cross multiply
    1,260.12x = 1,890.18 × 394.50
  4. Step 4: Simplify right side
    1,260.12x = 745,676.01
  5. Step 5: Solve for x
    x = 745,676.01/1,260.12
  6. Step 6: Final answer
    x = 591.75

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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.