Home / 1,279.10-1,918.36-499.12

Finding the Fourth Proportional to 1,279.10, 1,918.36 and 499.12

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Solution

The fourth proportional to 1,279.10, 1,918.36 and 499.12 is: 748.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.10 : 1,918.36 = 499.12 : x
  2. Step 2: Convert to fraction form
    1,279.10/1,918.36 = 499.12/x
  3. Step 3: Cross multiply
    1,279.10x = 1,918.36 × 499.12
  4. Step 4: Simplify right side
    1,279.10x = 957,485.80
  5. Step 5: Solve for x
    x = 957,485.80/1,279.10
  6. Step 6: Final answer
    x = 748.57

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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.