Home / 2,872.23-3,963.68-1,678.03

Finding the Fourth Proportional to 2,872.23, 3,963.68 and 1,678.03

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Solution

The fourth proportional to 2,872.23, 3,963.68 and 1,678.03 is: 2,315.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.23 : 3,963.68 = 1,678.03 : x
  2. Step 2: Convert to fraction form
    2,872.23/3,963.68 = 1,678.03/x
  3. Step 3: Cross multiply
    2,872.23x = 3,963.68 × 1,678.03
  4. Step 4: Simplify right side
    2,872.23x = 6,651,173.95
  5. Step 5: Solve for x
    x = 6,651,173.95/2,872.23
  6. Step 6: Final answer
    x = 2,315.68

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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.