Home / 2,170.16-2,991.84-1,638.80

Finding the Fourth Proportional to 2,170.16, 2,991.84 and 1,638.80

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Solution

The fourth proportional to 2,170.16, 2,991.84 and 1,638.80 is: 2,259.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.16 : 2,991.84 = 1,638.80 : x
  2. Step 2: Convert to fraction form
    2,170.16/2,991.84 = 1,638.80/x
  3. Step 3: Cross multiply
    2,170.16x = 2,991.84 × 1,638.80
  4. Step 4: Simplify right side
    2,170.16x = 4,903,027.39
  5. Step 5: Solve for x
    x = 4,903,027.39/2,170.16
  6. Step 6: Final answer
    x = 2,259.29

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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.