Home / 3,149.20-4,342.98-2,485

Finding the Fourth Proportional to 3,149.20, 4,342.98 and 2,485

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Solution

The fourth proportional to 3,149.20, 4,342.98 and 2,485 is: 3,427.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,149.20 : 4,342.98 = 2,485 : x
  2. Step 2: Convert to fraction form
    3,149.20/4,342.98 = 2,485/x
  3. Step 3: Cross multiply
    3,149.20x = 4,342.98 × 2,485
  4. Step 4: Simplify right side
    3,149.20x = 10,792,305.30
  5. Step 5: Solve for x
    x = 10,792,305.30/3,149.20
  6. Step 6: Final answer
    x = 3,427.00

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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.