Home / 1,108.26-1,660.21-669.29

Finding the Fourth Proportional to 1,108.26, 1,660.21 and 669.29

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Solution

The fourth proportional to 1,108.26, 1,660.21 and 669.29 is: 1,002.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.26 : 1,660.21 = 669.29 : x
  2. Step 2: Convert to fraction form
    1,108.26/1,660.21 = 669.29/x
  3. Step 3: Cross multiply
    1,108.26x = 1,660.21 × 669.29
  4. Step 4: Simplify right side
    1,108.26x = 1,111,151.98
  5. Step 5: Solve for x
    x = 1,111,151.98/1,108.26
  6. Step 6: Final answer
    x = 1,002.61

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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.