Home / 1,571.20-2,168.30-863.06

Finding the Fourth Proportional to 1,571.20, 2,168.30 and 863.06

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Solution

The fourth proportional to 1,571.20, 2,168.30 and 863.06 is: 1,191.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.20 : 2,168.30 = 863.06 : x
  2. Step 2: Convert to fraction form
    1,571.20/2,168.30 = 863.06/x
  3. Step 3: Cross multiply
    1,571.20x = 2,168.30 × 863.06
  4. Step 4: Simplify right side
    1,571.20x = 1,871,364.31
  5. Step 5: Solve for x
    x = 1,871,364.31/1,571.20
  6. Step 6: Final answer
    x = 1,191.04

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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.