Home / 1,279.06-1,918.62-457.18

Finding the Fourth Proportional to 1,279.06, 1,918.62 and 457.18

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Solution

The fourth proportional to 1,279.06, 1,918.62 and 457.18 is: 685.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.06 : 1,918.62 = 457.18 : x
  2. Step 2: Convert to fraction form
    1,279.06/1,918.62 = 457.18/x
  3. Step 3: Cross multiply
    1,279.06x = 1,918.62 × 457.18
  4. Step 4: Simplify right side
    1,279.06x = 877,149.90
  5. Step 5: Solve for x
    x = 877,149.90/1,279.06
  6. Step 6: Final answer
    x = 685.78

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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.