Home / 3,420.16-5,131.52-1,369.60

Finding the Fourth Proportional to 3,420.16, 5,131.52 and 1,369.60

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Solution

The fourth proportional to 3,420.16, 5,131.52 and 1,369.60 is: 2,054.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.16 : 5,131.52 = 1,369.60 : x
  2. Step 2: Convert to fraction form
    3,420.16/5,131.52 = 1,369.60/x
  3. Step 3: Cross multiply
    3,420.16x = 5,131.52 × 1,369.60
  4. Step 4: Simplify right side
    3,420.16x = 7,028,129.79
  5. Step 5: Solve for x
    x = 7,028,129.79/3,420.16
  6. Step 6: Final answer
    x = 2,054.91

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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.