Home / 1,571.14-2,168.20-908.21

Finding the Fourth Proportional to 1,571.14, 2,168.20 and 908.21

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Solution

The fourth proportional to 1,571.14, 2,168.20 and 908.21 is: 1,253.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.14 : 2,168.20 = 908.21 : x
  2. Step 2: Convert to fraction form
    1,571.14/2,168.20 = 908.21/x
  3. Step 3: Cross multiply
    1,571.14x = 2,168.20 × 908.21
  4. Step 4: Simplify right side
    1,571.14x = 1,969,170.08
  5. Step 5: Solve for x
    x = 1,969,170.08/1,571.14
  6. Step 6: Final answer
    x = 1,253.34

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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.