Home / 3,905.20-5,389.16-2,412.76

Finding the Fourth Proportional to 3,905.20, 5,389.16 and 2,412.76

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Solution

The fourth proportional to 3,905.20, 5,389.16 and 2,412.76 is: 3,329.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.20 : 5,389.16 = 2,412.76 : x
  2. Step 2: Convert to fraction form
    3,905.20/5,389.16 = 2,412.76/x
  3. Step 3: Cross multiply
    3,905.20x = 5,389.16 × 2,412.76
  4. Step 4: Simplify right side
    3,905.20x = 13,002,749.68
  5. Step 5: Solve for x
    x = 13,002,749.68/3,905.20
  6. Step 6: Final answer
    x = 3,329.60

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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.