Home / 3,999.42-5,518.56-2,405.68

Finding the Fourth Proportional to 3,999.42, 5,518.56 and 2,405.68

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Solution

The fourth proportional to 3,999.42, 5,518.56 and 2,405.68 is: 3,319.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.42 : 5,518.56 = 2,405.68 : x
  2. Step 2: Convert to fraction form
    3,999.42/5,518.56 = 2,405.68/x
  3. Step 3: Cross multiply
    3,999.42x = 5,518.56 × 2,405.68
  4. Step 4: Simplify right side
    3,999.42x = 13,275,889.42
  5. Step 5: Solve for x
    x = 13,275,889.42/3,999.42
  6. Step 6: Final answer
    x = 3,319.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.