Home / 3,128.49-4,315.97-1,801.91

Finding the Fourth Proportional to 3,128.49, 4,315.97 and 1,801.91

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Solution

The fourth proportional to 3,128.49, 4,315.97 and 1,801.91 is: 2,485.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.49 : 4,315.97 = 1,801.91 : x
  2. Step 2: Convert to fraction form
    3,128.49/4,315.97 = 1,801.91/x
  3. Step 3: Cross multiply
    3,128.49x = 4,315.97 × 1,801.91
  4. Step 4: Simplify right side
    3,128.49x = 7,776,989.50
  5. Step 5: Solve for x
    x = 7,776,989.50/3,128.49
  6. Step 6: Final answer
    x = 2,485.86

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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.