Home / 3,420.90-5,131.89-1,474.47

Finding the Fourth Proportional to 3,420.90, 5,131.89 and 1,474.47

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Solution

The fourth proportional to 3,420.90, 5,131.89 and 1,474.47 is: 2,211.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.90 : 5,131.89 = 1,474.47 : x
  2. Step 2: Convert to fraction form
    3,420.90/5,131.89 = 1,474.47/x
  3. Step 3: Cross multiply
    3,420.90x = 5,131.89 × 1,474.47
  4. Step 4: Simplify right side
    3,420.90x = 7,566,817.85
  5. Step 5: Solve for x
    x = 7,566,817.85/3,420.90
  6. Step 6: Final answer
    x = 2,211.94

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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.