Home / 1,260.46-1,890.30-479.89

Finding the Fourth Proportional to 1,260.46, 1,890.30 and 479.89

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Solution

The fourth proportional to 1,260.46, 1,890.30 and 479.89 is: 719.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.46 : 1,890.30 = 479.89 : x
  2. Step 2: Convert to fraction form
    1,260.46/1,890.30 = 479.89/x
  3. Step 3: Cross multiply
    1,260.46x = 1,890.30 × 479.89
  4. Step 4: Simplify right side
    1,260.46x = 907,136.07
  5. Step 5: Solve for x
    x = 907,136.07/1,260.46
  6. Step 6: Final answer
    x = 719.69

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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.