Home / 2,639.91-3,643.21-1,521.03

Finding the Fourth Proportional to 2,639.91, 3,643.21 and 1,521.03

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Solution

The fourth proportional to 2,639.91, 3,643.21 and 1,521.03 is: 2,099.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.91 : 3,643.21 = 1,521.03 : x
  2. Step 2: Convert to fraction form
    2,639.91/3,643.21 = 1,521.03/x
  3. Step 3: Cross multiply
    2,639.91x = 3,643.21 × 1,521.03
  4. Step 4: Simplify right side
    2,639.91x = 5,541,431.71
  5. Step 5: Solve for x
    x = 5,541,431.71/2,639.91
  6. Step 6: Final answer
    x = 2,099.10

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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.