Home / 3,990.15-5,507.10-2,419.02

Finding the Fourth Proportional to 3,990.15, 5,507.10 and 2,419.02

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Solution

The fourth proportional to 3,990.15, 5,507.10 and 2,419.02 is: 3,338.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.15 : 5,507.10 = 2,419.02 : x
  2. Step 2: Convert to fraction form
    3,990.15/5,507.10 = 2,419.02/x
  3. Step 3: Cross multiply
    3,990.15x = 5,507.10 × 2,419.02
  4. Step 4: Simplify right side
    3,990.15x = 13,321,785.04
  5. Step 5: Solve for x
    x = 13,321,785.04/3,990.15
  6. Step 6: Final answer
    x = 3,338.67

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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.