Home / 2,878.42-3,972.18-1,619.38

Finding the Fourth Proportional to 2,878.42, 3,972.18 and 1,619.38

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Solution

The fourth proportional to 2,878.42, 3,972.18 and 1,619.38 is: 2,234.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.42 : 3,972.18 = 1,619.38 : x
  2. Step 2: Convert to fraction form
    2,878.42/3,972.18 = 1,619.38/x
  3. Step 3: Cross multiply
    2,878.42x = 3,972.18 × 1,619.38
  4. Step 4: Simplify right side
    2,878.42x = 6,432,468.85
  5. Step 5: Solve for x
    x = 6,432,468.85/2,878.42
  6. Step 6: Final answer
    x = 2,234.72

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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.