Home / 1,399.86-2,098.44-1,279.58

Finding the Fourth Proportional to 1,399.86, 2,098.44 and 1,279.58

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Solution

The fourth proportional to 1,399.86, 2,098.44 and 1,279.58 is: 1,918.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.86 : 2,098.44 = 1,279.58 : x
  2. Step 2: Convert to fraction form
    1,399.86/2,098.44 = 1,279.58/x
  3. Step 3: Cross multiply
    1,399.86x = 2,098.44 × 1,279.58
  4. Step 4: Simplify right side
    1,399.86x = 2,685,111.36
  5. Step 5: Solve for x
    x = 2,685,111.36/1,399.86
  6. Step 6: Final answer
    x = 1,918.13

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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.