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Finding the Fourth Proportional to 871.25, 1,305.73 and 558.77

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Solution

The fourth proportional to 871.25, 1,305.73 and 558.77 is: 837.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.25 : 1,305.73 = 558.77 : x
  2. Step 2: Convert to fraction form
    871.25/1,305.73 = 558.77/x
  3. Step 3: Cross multiply
    871.25x = 1,305.73 × 558.77
  4. Step 4: Simplify right side
    871.25x = 729,596.92
  5. Step 5: Solve for x
    x = 729,596.92/871.25
  6. Step 6: Final answer
    x = 837.42

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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.