Home / 3,421.31-4,721.33-1,929.21

Finding the Fourth Proportional to 3,421.31, 4,721.33 and 1,929.21

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Solution

The fourth proportional to 3,421.31, 4,721.33 and 1,929.21 is: 2,662.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.31 : 4,721.33 = 1,929.21 : x
  2. Step 2: Convert to fraction form
    3,421.31/4,721.33 = 1,929.21/x
  3. Step 3: Cross multiply
    3,421.31x = 4,721.33 × 1,929.21
  4. Step 4: Simplify right side
    3,421.31x = 9,108,427.40
  5. Step 5: Solve for x
    x = 9,108,427.40/3,421.31
  6. Step 6: Final answer
    x = 2,662.27

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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.