Home / 1,215.09-1,676.50-743.04

Finding the Fourth Proportional to 1,215.09, 1,676.50 and 743.04

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Solution

The fourth proportional to 1,215.09, 1,676.50 and 743.04 is: 1,025.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.09 : 1,676.50 = 743.04 : x
  2. Step 2: Convert to fraction form
    1,215.09/1,676.50 = 743.04/x
  3. Step 3: Cross multiply
    1,215.09x = 1,676.50 × 743.04
  4. Step 4: Simplify right side
    1,215.09x = 1,245,704.70
  5. Step 5: Solve for x
    x = 1,245,704.70/1,215.09
  6. Step 6: Final answer
    x = 1,025.20

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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.