Home / 2,639.64-3,938.96-2,289.72

Finding the Fourth Proportional to 2,639.64, 3,938.96 and 2,289.72

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Solution

The fourth proportional to 2,639.64, 3,938.96 and 2,289.72 is: 3,416.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.64 : 3,938.96 = 2,289.72 : x
  2. Step 2: Convert to fraction form
    2,639.64/3,938.96 = 2,289.72/x
  3. Step 3: Cross multiply
    2,639.64x = 3,938.96 × 2,289.72
  4. Step 4: Simplify right side
    2,639.64x = 9,019,104.04
  5. Step 5: Solve for x
    x = 9,019,104.04/2,639.64
  6. Step 6: Final answer
    x = 3,416.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.