Home / 3,128.68-4,315.98-1,949.32

Finding the Fourth Proportional to 3,128.68, 4,315.98 and 1,949.32

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Solution

The fourth proportional to 3,128.68, 4,315.98 and 1,949.32 is: 2,689.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.68 : 4,315.98 = 1,949.32 : x
  2. Step 2: Convert to fraction form
    3,128.68/4,315.98 = 1,949.32/x
  3. Step 3: Cross multiply
    3,128.68x = 4,315.98 × 1,949.32
  4. Step 4: Simplify right side
    3,128.68x = 8,413,226.13
  5. Step 5: Solve for x
    x = 8,413,226.13/3,128.68
  6. Step 6: Final answer
    x = 2,689.07

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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.