Home / 2,721.45-4,082.08-720.15

Finding the Fourth Proportional to 2,721.45, 4,082.08 and 720.15

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Solution

The fourth proportional to 2,721.45, 4,082.08 and 720.15 is: 1,080.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.45 : 4,082.08 = 720.15 : x
  2. Step 2: Convert to fraction form
    2,721.45/4,082.08 = 720.15/x
  3. Step 3: Cross multiply
    2,721.45x = 4,082.08 × 720.15
  4. Step 4: Simplify right side
    2,721.45x = 2,939,709.91
  5. Step 5: Solve for x
    x = 2,939,709.91/2,721.45
  6. Step 6: Final answer
    x = 1,080.20

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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.