Home / 2,115.14-2,919.62-1,231.69

Finding the Fourth Proportional to 2,115.14, 2,919.62 and 1,231.69

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Solution

The fourth proportional to 2,115.14, 2,919.62 and 1,231.69 is: 1,700.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.14 : 2,919.62 = 1,231.69 : x
  2. Step 2: Convert to fraction form
    2,115.14/2,919.62 = 1,231.69/x
  3. Step 3: Cross multiply
    2,115.14x = 2,919.62 × 1,231.69
  4. Step 4: Simplify right side
    2,115.14x = 3,596,053.30
  5. Step 5: Solve for x
    x = 3,596,053.30/2,115.14
  6. Step 6: Final answer
    x = 1,700.15

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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.