Home / 3,185.12-4,777.56-876.56

Finding the Fourth Proportional to 3,185.12, 4,777.56 and 876.56

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Solution

The fourth proportional to 3,185.12, 4,777.56 and 876.56 is: 1,314.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,185.12 : 4,777.56 = 876.56 : x
  2. Step 2: Convert to fraction form
    3,185.12/4,777.56 = 876.56/x
  3. Step 3: Cross multiply
    3,185.12x = 4,777.56 × 876.56
  4. Step 4: Simplify right side
    3,185.12x = 4,187,817.99
  5. Step 5: Solve for x
    x = 4,187,817.99/3,185.12
  6. Step 6: Final answer
    x = 1,314.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.