Home / 2,640.20-3,643.58-1,521.38

Finding the Fourth Proportional to 2,640.20, 3,643.58 and 1,521.38

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Solution

The fourth proportional to 2,640.20, 3,643.58 and 1,521.38 is: 2,099.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.20 : 3,643.58 = 1,521.38 : x
  2. Step 2: Convert to fraction form
    2,640.20/3,643.58 = 1,521.38/x
  3. Step 3: Cross multiply
    2,640.20x = 3,643.58 × 1,521.38
  4. Step 4: Simplify right side
    2,640.20x = 5,543,282.65
  5. Step 5: Solve for x
    x = 5,543,282.65/2,640.20
  6. Step 6: Final answer
    x = 2,099.57

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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.