Home / 1,806.13-2,491.72-1,216.86

Finding the Fourth Proportional to 1,806.13, 2,491.72 and 1,216.86

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Solution

The fourth proportional to 1,806.13, 2,491.72 and 1,216.86 is: 1,678.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.13 : 2,491.72 = 1,216.86 : x
  2. Step 2: Convert to fraction form
    1,806.13/2,491.72 = 1,216.86/x
  3. Step 3: Cross multiply
    1,806.13x = 2,491.72 × 1,216.86
  4. Step 4: Simplify right side
    1,806.13x = 3,032,074.40
  5. Step 5: Solve for x
    x = 3,032,074.40/1,806.13
  6. Step 6: Final answer
    x = 1,678.77

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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.