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Finding the Fourth Proportional to 751.41, 1,120.69 and 725.29

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Solution

The fourth proportional to 751.41, 1,120.69 and 725.29 is: 1,081.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.41 : 1,120.69 = 725.29 : x
  2. Step 2: Convert to fraction form
    751.41/1,120.69 = 725.29/x
  3. Step 3: Cross multiply
    751.41x = 1,120.69 × 725.29
  4. Step 4: Simplify right side
    751.41x = 812,825.25
  5. Step 5: Solve for x
    x = 812,825.25/751.41
  6. Step 6: Final answer
    x = 1,081.73

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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.