Home / 1,806.30-2,491.72-1,215.81

Finding the Fourth Proportional to 1,806.30, 2,491.72 and 1,215.81

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Solution

The fourth proportional to 1,806.30, 2,491.72 and 1,215.81 is: 1,677.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.30 : 2,491.72 = 1,215.81 : x
  2. Step 2: Convert to fraction form
    1,806.30/2,491.72 = 1,215.81/x
  3. Step 3: Cross multiply
    1,806.30x = 2,491.72 × 1,215.81
  4. Step 4: Simplify right side
    1,806.30x = 3,029,455.05
  5. Step 5: Solve for x
    x = 3,029,455.05/1,806.30
  6. Step 6: Final answer
    x = 1,677.16

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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.