Home / 2,628.40-3,937.20-1,330.60

Finding the Fourth Proportional to 2,628.40, 3,937.20 and 1,330.60

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Solution

The fourth proportional to 2,628.40, 3,937.20 and 1,330.60 is: 1,993.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.40 : 3,937.20 = 1,330.60 : x
  2. Step 2: Convert to fraction form
    2,628.40/3,937.20 = 1,330.60/x
  3. Step 3: Cross multiply
    2,628.40x = 3,937.20 × 1,330.60
  4. Step 4: Simplify right side
    2,628.40x = 5,238,838.32
  5. Step 5: Solve for x
    x = 5,238,838.32/2,628.40
  6. Step 6: Final answer
    x = 1,993.17

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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.