Home / 3,128.40-4,315.77-1,801.62

Finding the Fourth Proportional to 3,128.40, 4,315.77 and 1,801.62

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Solution

The fourth proportional to 3,128.40, 4,315.77 and 1,801.62 is: 2,485.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.40 : 4,315.77 = 1,801.62 : x
  2. Step 2: Convert to fraction form
    3,128.40/4,315.77 = 1,801.62/x
  3. Step 3: Cross multiply
    3,128.40x = 4,315.77 × 1,801.62
  4. Step 4: Simplify right side
    3,128.40x = 7,775,377.55
  5. Step 5: Solve for x
    x = 7,775,377.55/3,128.40
  6. Step 6: Final answer
    x = 2,485.42

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1.5x scale

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.