Home / 3,430.64-5,146.20-1,121.36

Finding the Fourth Proportional to 3,430.64, 5,146.20 and 1,121.36

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Solution

The fourth proportional to 3,430.64, 5,146.20 and 1,121.36 is: 1,682.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.64 : 5,146.20 = 1,121.36 : x
  2. Step 2: Convert to fraction form
    3,430.64/5,146.20 = 1,121.36/x
  3. Step 3: Cross multiply
    3,430.64x = 5,146.20 × 1,121.36
  4. Step 4: Simplify right side
    3,430.64x = 5,770,742.83
  5. Step 5: Solve for x
    x = 5,770,742.83/3,430.64
  6. Step 6: Final answer
    x = 1,682.12

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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.