Home / 2,639.79-3,958.47-1,178.15

Finding the Fourth Proportional to 2,639.79, 3,958.47 and 1,178.15

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Solution

The fourth proportional to 2,639.79, 3,958.47 and 1,178.15 is: 1,766.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.79 : 3,958.47 = 1,178.15 : x
  2. Step 2: Convert to fraction form
    2,639.79/3,958.47 = 1,178.15/x
  3. Step 3: Cross multiply
    2,639.79x = 3,958.47 × 1,178.15
  4. Step 4: Simplify right side
    2,639.79x = 4,663,651.64
  5. Step 5: Solve for x
    x = 4,663,651.64/2,639.79
  6. Step 6: Final answer
    x = 1,766.68

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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.