Home / 1,126.91-1,555.20-629.58

Finding the Fourth Proportional to 1,126.91, 1,555.20 and 629.58

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Solution

The fourth proportional to 1,126.91, 1,555.20 and 629.58 is: 868.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.91 : 1,555.20 = 629.58 : x
  2. Step 2: Convert to fraction form
    1,126.91/1,555.20 = 629.58/x
  3. Step 3: Cross multiply
    1,126.91x = 1,555.20 × 629.58
  4. Step 4: Simplify right side
    1,126.91x = 979,121.24
  5. Step 5: Solve for x
    x = 979,121.24/1,126.91
  6. Step 6: Final answer
    x = 868.86

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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.