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Finding the Fourth Proportional to 751.26, 1,120.83 and 669.18

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Solution

The fourth proportional to 751.26, 1,120.83 and 669.18 is: 998.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.26 : 1,120.83 = 669.18 : x
  2. Step 2: Convert to fraction form
    751.26/1,120.83 = 669.18/x
  3. Step 3: Cross multiply
    751.26x = 1,120.83 × 669.18
  4. Step 4: Simplify right side
    751.26x = 750,037.02
  5. Step 5: Solve for x
    x = 750,037.02/751.26
  6. Step 6: Final answer
    x = 998.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.