Home / 2,639.04-3,958.28-691.25

Finding the Fourth Proportional to 2,639.04, 3,958.28 and 691.25

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Solution

The fourth proportional to 2,639.04, 3,958.28 and 691.25 is: 1,036.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.04 : 3,958.28 = 691.25 : x
  2. Step 2: Convert to fraction form
    2,639.04/3,958.28 = 691.25/x
  3. Step 3: Cross multiply
    2,639.04x = 3,958.28 × 691.25
  4. Step 4: Simplify right side
    2,639.04x = 2,736,137.80
  5. Step 5: Solve for x
    x = 2,736,137.80/2,639.04
  6. Step 6: Final answer
    x = 1,036.79

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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.