Home / 2,721.42-4,083.08-1,680.21

Finding the Fourth Proportional to 2,721.42, 4,083.08 and 1,680.21

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Solution

The fourth proportional to 2,721.42, 4,083.08 and 1,680.21 is: 2,520.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.42 : 4,083.08 = 1,680.21 : x
  2. Step 2: Convert to fraction form
    2,721.42/4,083.08 = 1,680.21/x
  3. Step 3: Cross multiply
    2,721.42x = 4,083.08 × 1,680.21
  4. Step 4: Simplify right side
    2,721.42x = 6,860,423.45
  5. Step 5: Solve for x
    x = 6,860,423.45/2,721.42
  6. Step 6: Final answer
    x = 2,520.90

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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.