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Finding the Fourth Proportional to 1,571.33, 2,167.70 and 908.04

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Solution

The fourth proportional to 1,571.33, 2,167.70 and 908.04 is: 1,252.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.33 : 2,167.70 = 908.04 : x
  2. Step 2: Convert to fraction form
    1,571.33/2,167.70 = 908.04/x
  3. Step 3: Cross multiply
    1,571.33x = 2,167.70 × 908.04
  4. Step 4: Simplify right side
    1,571.33x = 1,968,361.90
  5. Step 5: Solve for x
    x = 1,968,361.90/1,571.33
  6. Step 6: Final answer
    x = 1,252.67

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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.