Home / 2,115.59-2,919.75-1,231.94

Finding the Fourth Proportional to 2,115.59, 2,919.75 and 1,231.94

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Solution

The fourth proportional to 2,115.59, 2,919.75 and 1,231.94 is: 1,700.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.59 : 2,919.75 = 1,231.94 : x
  2. Step 2: Convert to fraction form
    2,115.59/2,919.75 = 1,231.94/x
  3. Step 3: Cross multiply
    2,115.59x = 2,919.75 × 1,231.94
  4. Step 4: Simplify right side
    2,115.59x = 3,596,959.49
  5. Step 5: Solve for x
    x = 3,596,959.49/2,115.59
  6. Step 6: Final answer
    x = 1,700.22

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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.