Home / 3,960.40-5,459.52-2,910.64

Finding the Fourth Proportional to 3,960.40, 5,459.52 and 2,910.64

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Solution

The fourth proportional to 3,960.40, 5,459.52 and 2,910.64 is: 4,012.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960.40 : 5,459.52 = 2,910.64 : x
  2. Step 2: Convert to fraction form
    3,960.40/5,459.52 = 2,910.64/x
  3. Step 3: Cross multiply
    3,960.40x = 5,459.52 × 2,910.64
  4. Step 4: Simplify right side
    3,960.40x = 15,890,697.29
  5. Step 5: Solve for x
    x = 15,890,697.29/3,960.40
  6. Step 6: Final answer
    x = 4,012.40

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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.