Home / 751.20-1,126.74-231.18

Finding the Fourth Proportional to 751.20, 1,126.74 and 231.18

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Solution

The fourth proportional to 751.20, 1,126.74 and 231.18 is: 346.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.20 : 1,126.74 = 231.18 : x
  2. Step 2: Convert to fraction form
    751.20/1,126.74 = 231.18/x
  3. Step 3: Cross multiply
    751.20x = 1,126.74 × 231.18
  4. Step 4: Simplify right side
    751.20x = 260,479.75
  5. Step 5: Solve for x
    x = 260,479.75/751.20
  6. Step 6: Final answer
    x = 346.75

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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.