Home / 751.24-1,126.87-385.80

Finding the Fourth Proportional to 751.24, 1,126.87 and 385.80

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Solution

The fourth proportional to 751.24, 1,126.87 and 385.80 is: 578.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.24 : 1,126.87 = 385.80 : x
  2. Step 2: Convert to fraction form
    751.24/1,126.87 = 385.80/x
  3. Step 3: Cross multiply
    751.24x = 1,126.87 × 385.80
  4. Step 4: Simplify right side
    751.24x = 434,738.88
  5. Step 5: Solve for x
    x = 434,738.88/751.24
  6. Step 6: Final answer
    x = 578.70

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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.