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Finding the Fourth Proportional to 1,571.94, 2,357.64 and 879.30

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Solution

The fourth proportional to 1,571.94, 2,357.64 and 879.30 is: 1,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.94 : 2,357.64 = 879.30 : x
  2. Step 2: Convert to fraction form
    1,571.94/2,357.64 = 879.30/x
  3. Step 3: Cross multiply
    1,571.94x = 2,357.64 × 879.30
  4. Step 4: Simplify right side
    1,571.94x = 2,073,072.85
  5. Step 5: Solve for x
    x = 2,073,072.85/1,571.94
  6. Step 6: Final answer
    x = 1,318.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.