Home / 1,260.58-1,890.79-394.89

Finding the Fourth Proportional to 1,260.58, 1,890.79 and 394.89

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Solution

The fourth proportional to 1,260.58, 1,890.79 and 394.89 is: 592.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.58 : 1,890.79 = 394.89 : x
  2. Step 2: Convert to fraction form
    1,260.58/1,890.79 = 394.89/x
  3. Step 3: Cross multiply
    1,260.58x = 1,890.79 × 394.89
  4. Step 4: Simplify right side
    1,260.58x = 746,658.84
  5. Step 5: Solve for x
    x = 746,658.84/1,260.58
  6. Step 6: Final answer
    x = 592.31

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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.