Home / 1,102.23-1,520.70-629.79

Finding the Fourth Proportional to 1,102.23, 1,520.70 and 629.79

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Solution

The fourth proportional to 1,102.23, 1,520.70 and 629.79 is: 868.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.23 : 1,520.70 = 629.79 : x
  2. Step 2: Convert to fraction form
    1,102.23/1,520.70 = 629.79/x
  3. Step 3: Cross multiply
    1,102.23x = 1,520.70 × 629.79
  4. Step 4: Simplify right side
    1,102.23x = 957,721.65
  5. Step 5: Solve for x
    x = 957,721.65/1,102.23
  6. Step 6: Final answer
    x = 868.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.