Home / 2,153.96-3,240.70-1,288.92

Finding the Fourth Proportional to 2,153.96, 3,240.70 and 1,288.92

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Solution

The fourth proportional to 2,153.96, 3,240.70 and 1,288.92 is: 1,939.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.96 : 3,240.70 = 1,288.92 : x
  2. Step 2: Convert to fraction form
    2,153.96/3,240.70 = 1,288.92/x
  3. Step 3: Cross multiply
    2,153.96x = 3,240.70 × 1,288.92
  4. Step 4: Simplify right side
    2,153.96x = 4,177,003.04
  5. Step 5: Solve for x
    x = 4,177,003.04/2,153.96
  6. Step 6: Final answer
    x = 1,939.22

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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.