Home / 3,131.58-4,320.60-1,805.12

Finding the Fourth Proportional to 3,131.58, 4,320.60 and 1,805.12

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Solution

The fourth proportional to 3,131.58, 4,320.60 and 1,805.12 is: 2,490.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.58 : 4,320.60 = 1,805.12 : x
  2. Step 2: Convert to fraction form
    3,131.58/4,320.60 = 1,805.12/x
  3. Step 3: Cross multiply
    3,131.58x = 4,320.60 × 1,805.12
  4. Step 4: Simplify right side
    3,131.58x = 7,799,179.87
  5. Step 5: Solve for x
    x = 7,799,179.87/3,131.58
  6. Step 6: Final answer
    x = 2,490.49

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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.