Home / 1,805.09-2,491.83-1,215.95

Finding the Fourth Proportional to 1,805.09, 2,491.83 and 1,215.95

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Solution

The fourth proportional to 1,805.09, 2,491.83 and 1,215.95 is: 1,678.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.09 : 2,491.83 = 1,215.95 : x
  2. Step 2: Convert to fraction form
    1,805.09/2,491.83 = 1,215.95/x
  3. Step 3: Cross multiply
    1,805.09x = 2,491.83 × 1,215.95
  4. Step 4: Simplify right side
    1,805.09x = 3,029,928.23
  5. Step 5: Solve for x
    x = 3,029,928.23/1,805.09
  6. Step 6: Final answer
    x = 1,678.55

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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.