Home / 1,260.09-1,890.19-479.84

Finding the Fourth Proportional to 1,260.09, 1,890.19 and 479.84

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Solution

The fourth proportional to 1,260.09, 1,890.19 and 479.84 is: 719.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.09 : 1,890.19 = 479.84 : x
  2. Step 2: Convert to fraction form
    1,260.09/1,890.19 = 479.84/x
  3. Step 3: Cross multiply
    1,260.09x = 1,890.19 × 479.84
  4. Step 4: Simplify right side
    1,260.09x = 906,979.92
  5. Step 5: Solve for x
    x = 906,979.92/1,260.09
  6. Step 6: Final answer
    x = 719.77

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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.