Home / 1,279.44-1,918.32-457.29

Finding the Fourth Proportional to 1,279.44, 1,918.32 and 457.29

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Solution

The fourth proportional to 1,279.44, 1,918.32 and 457.29 is: 685.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.44 : 1,918.32 = 457.29 : x
  2. Step 2: Convert to fraction form
    1,279.44/1,918.32 = 457.29/x
  3. Step 3: Cross multiply
    1,279.44x = 1,918.32 × 457.29
  4. Step 4: Simplify right side
    1,279.44x = 877,228.55
  5. Step 5: Solve for x
    x = 877,228.55/1,279.44
  6. Step 6: Final answer
    x = 685.63

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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.