Home / 3,420.40-5,131.12-1,472.56

Finding the Fourth Proportional to 3,420.40, 5,131.12 and 1,472.56

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Solution

The fourth proportional to 3,420.40, 5,131.12 and 1,472.56 is: 2,209.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.40 : 5,131.12 = 1,472.56 : x
  2. Step 2: Convert to fraction form
    3,420.40/5,131.12 = 1,472.56/x
  3. Step 3: Cross multiply
    3,420.40x = 5,131.12 × 1,472.56
  4. Step 4: Simplify right side
    3,420.40x = 7,555,882.07
  5. Step 5: Solve for x
    x = 7,555,882.07/3,420.40
  6. Step 6: Final answer
    x = 2,209.06

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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.