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Finding the Fourth Proportional to 1,571.36, 2,168.53 and 872.73

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Solution

The fourth proportional to 1,571.36, 2,168.53 and 872.73 is: 1,204.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.36 : 2,168.53 = 872.73 : x
  2. Step 2: Convert to fraction form
    1,571.36/2,168.53 = 872.73/x
  3. Step 3: Cross multiply
    1,571.36x = 2,168.53 × 872.73
  4. Step 4: Simplify right side
    1,571.36x = 1,892,539.01
  5. Step 5: Solve for x
    x = 1,892,539.01/1,571.36
  6. Step 6: Final answer
    x = 1,204.40

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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.