Home / 4,178.20-5,765.90-2,315.20

Finding the Fourth Proportional to 4,178.20, 5,765.90 and 2,315.20

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Solution

The fourth proportional to 4,178.20, 5,765.90 and 2,315.20 is: 3,194.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,178.20 : 5,765.90 = 2,315.20 : x
  2. Step 2: Convert to fraction form
    4,178.20/5,765.90 = 2,315.20/x
  3. Step 3: Cross multiply
    4,178.20x = 5,765.90 × 2,315.20
  4. Step 4: Simplify right side
    4,178.20x = 13,349,211.68
  5. Step 5: Solve for x
    x = 13,349,211.68/4,178.20
  6. Step 6: Final answer
    x = 3,194.97

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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.