Home / 1,976.40-2,960.28-1,628.64

Finding the Fourth Proportional to 1,976.40, 2,960.28 and 1,628.64

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Solution

The fourth proportional to 1,976.40, 2,960.28 and 1,628.64 is: 2,439.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,976.40 : 2,960.28 = 1,628.64 : x
  2. Step 2: Convert to fraction form
    1,976.40/2,960.28 = 1,628.64/x
  3. Step 3: Cross multiply
    1,976.40x = 2,960.28 × 1,628.64
  4. Step 4: Simplify right side
    1,976.40x = 4,821,230.42
  5. Step 5: Solve for x
    x = 4,821,230.42/1,976.40
  6. Step 6: Final answer
    x = 2,439.40

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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.