Home / 1,279.34-1,918.72-499.07

Finding the Fourth Proportional to 1,279.34, 1,918.72 and 499.07

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Solution

The fourth proportional to 1,279.34, 1,918.72 and 499.07 is: 748.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.34 : 1,918.72 = 499.07 : x
  2. Step 2: Convert to fraction form
    1,279.34/1,918.72 = 499.07/x
  3. Step 3: Cross multiply
    1,279.34x = 1,918.72 × 499.07
  4. Step 4: Simplify right side
    1,279.34x = 957,581.01
  5. Step 5: Solve for x
    x = 957,581.01/1,279.34
  6. Step 6: Final answer
    x = 748.50

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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.