Home / 2,658.15-3,989.12-1,198.53

Finding the Fourth Proportional to 2,658.15, 3,989.12 and 1,198.53

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Solution

The fourth proportional to 2,658.15, 3,989.12 and 1,198.53 is: 1,798.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.15 : 3,989.12 = 1,198.53 : x
  2. Step 2: Convert to fraction form
    2,658.15/3,989.12 = 1,198.53/x
  3. Step 3: Cross multiply
    2,658.15x = 3,989.12 × 1,198.53
  4. Step 4: Simplify right side
    2,658.15x = 4,781,074.00
  5. Step 5: Solve for x
    x = 4,781,074.00/2,658.15
  6. Step 6: Final answer
    x = 1,798.65

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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.