Home / 2,431.28-3,640.80-2,209.34

Finding the Fourth Proportional to 2,431.28, 3,640.80 and 2,209.34

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Solution

The fourth proportional to 2,431.28, 3,640.80 and 2,209.34 is: 3,308.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,431.28 : 3,640.80 = 2,209.34 : x
  2. Step 2: Convert to fraction form
    2,431.28/3,640.80 = 2,209.34/x
  3. Step 3: Cross multiply
    2,431.28x = 3,640.80 × 2,209.34
  4. Step 4: Simplify right side
    2,431.28x = 8,043,765.07
  5. Step 5: Solve for x
    x = 8,043,765.07/2,431.28
  6. Step 6: Final answer
    x = 3,308.45

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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.