Home / 3,128.54-4,315.48-2,065.91

Finding the Fourth Proportional to 3,128.54, 4,315.48 and 2,065.91

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Solution

The fourth proportional to 3,128.54, 4,315.48 and 2,065.91 is: 2,849.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.54 : 4,315.48 = 2,065.91 : x
  2. Step 2: Convert to fraction form
    3,128.54/4,315.48 = 2,065.91/x
  3. Step 3: Cross multiply
    3,128.54x = 4,315.48 × 2,065.91
  4. Step 4: Simplify right side
    3,128.54x = 8,915,366.54
  5. Step 5: Solve for x
    x = 8,915,366.54/3,128.54
  6. Step 6: Final answer
    x = 2,849.69

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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.