Home / 2,639.79-3,645.61-2,193.28

Finding the Fourth Proportional to 2,639.79, 3,645.61 and 2,193.28

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Solution

The fourth proportional to 2,639.79, 3,645.61 and 2,193.28 is: 3,028.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.79 : 3,645.61 = 2,193.28 : x
  2. Step 2: Convert to fraction form
    2,639.79/3,645.61 = 2,193.28/x
  3. Step 3: Cross multiply
    2,639.79x = 3,645.61 × 2,193.28
  4. Step 4: Simplify right side
    2,639.79x = 7,995,828.90
  5. Step 5: Solve for x
    x = 7,995,828.90/2,639.79
  6. Step 6: Final answer
    x = 3,028.96

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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.