Home / 2,648.40-3,972.60-1,190.40

Finding the Fourth Proportional to 2,648.40, 3,972.60 and 1,190.40

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Solution

The fourth proportional to 2,648.40, 3,972.60 and 1,190.40 is: 1,785.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,648.40 : 3,972.60 = 1,190.40 : x
  2. Step 2: Convert to fraction form
    2,648.40/3,972.60 = 1,190.40/x
  3. Step 3: Cross multiply
    2,648.40x = 3,972.60 × 1,190.40
  4. Step 4: Simplify right side
    2,648.40x = 4,728,983.04
  5. Step 5: Solve for x
    x = 4,728,983.04/2,648.40
  6. Step 6: Final answer
    x = 1,785.60

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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.