Home / 2,115.44-2,918.72-1,231.68

Finding the Fourth Proportional to 2,115.44, 2,918.72 and 1,231.68

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Solution

The fourth proportional to 2,115.44, 2,918.72 and 1,231.68 is: 1,699.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.44 : 2,918.72 = 1,231.68 : x
  2. Step 2: Convert to fraction form
    2,115.44/2,918.72 = 1,231.68/x
  3. Step 3: Cross multiply
    2,115.44x = 2,918.72 × 1,231.68
  4. Step 4: Simplify right side
    2,115.44x = 3,594,929.05
  5. Step 5: Solve for x
    x = 3,594,929.05/2,115.44
  6. Step 6: Final answer
    x = 1,699.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.