Home / 3,405.15-5,108.67-1,213.97

Finding the Fourth Proportional to 3,405.15, 5,108.67 and 1,213.97

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Solution

The fourth proportional to 3,405.15, 5,108.67 and 1,213.97 is: 1,821.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.15 : 5,108.67 = 1,213.97 : x
  2. Step 2: Convert to fraction form
    3,405.15/5,108.67 = 1,213.97/x
  3. Step 3: Cross multiply
    3,405.15x = 5,108.67 × 1,213.97
  4. Step 4: Simplify right side
    3,405.15x = 6,201,746.58
  5. Step 5: Solve for x
    x = 6,201,746.58/3,405.15
  6. Step 6: Final answer
    x = 1,821.28

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1.5x scale

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.