Home / 2,861.80-3,946.16-2,485.45

Finding the Fourth Proportional to 2,861.80, 3,946.16 and 2,485.45

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Solution

The fourth proportional to 2,861.80, 3,946.16 and 2,485.45 is: 3,427.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.80 : 3,946.16 = 2,485.45 : x
  2. Step 2: Convert to fraction form
    2,861.80/3,946.16 = 2,485.45/x
  3. Step 3: Cross multiply
    2,861.80x = 3,946.16 × 2,485.45
  4. Step 4: Simplify right side
    2,861.80x = 9,807,983.37
  5. Step 5: Solve for x
    x = 9,807,983.37/2,861.80
  6. Step 6: Final answer
    x = 3,427.21

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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.