Home / 1,638.65-2,260.95-1,079.21

Finding the Fourth Proportional to 1,638.65, 2,260.95 and 1,079.21

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Solution

The fourth proportional to 1,638.65, 2,260.95 and 1,079.21 is: 1,489.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.65 : 2,260.95 = 1,079.21 : x
  2. Step 2: Convert to fraction form
    1,638.65/2,260.95 = 1,079.21/x
  3. Step 3: Cross multiply
    1,638.65x = 2,260.95 × 1,079.21
  4. Step 4: Simplify right side
    1,638.65x = 2,440,028.54
  5. Step 5: Solve for x
    x = 2,440,028.54/1,638.65
  6. Step 6: Final answer
    x = 1,489.05

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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.