Home / 3,405.92-5,107.72-1,325.76

Finding the Fourth Proportional to 3,405.92, 5,107.72 and 1,325.76

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Solution

The fourth proportional to 3,405.92, 5,107.72 and 1,325.76 is: 1,988.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.92 : 5,107.72 = 1,325.76 : x
  2. Step 2: Convert to fraction form
    3,405.92/5,107.72 = 1,325.76/x
  3. Step 3: Cross multiply
    3,405.92x = 5,107.72 × 1,325.76
  4. Step 4: Simplify right side
    3,405.92x = 6,771,610.87
  5. Step 5: Solve for x
    x = 6,771,610.87/3,405.92
  6. Step 6: Final answer
    x = 1,988.19

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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.