Home / 2,143.48-3,215.31-845.23

Finding the Fourth Proportional to 2,143.48, 3,215.31 and 845.23

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Solution

The fourth proportional to 2,143.48, 3,215.31 and 845.23 is: 1,267.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.48 : 3,215.31 = 845.23 : x
  2. Step 2: Convert to fraction form
    2,143.48/3,215.31 = 845.23/x
  3. Step 3: Cross multiply
    2,143.48x = 3,215.31 × 845.23
  4. Step 4: Simplify right side
    2,143.48x = 2,717,676.47
  5. Step 5: Solve for x
    x = 2,717,676.47/2,143.48
  6. Step 6: Final answer
    x = 1,267.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.