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Finding the Fourth Proportional to 851.77, 1,174.96 and 520.27

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Solution

The fourth proportional to 851.77, 1,174.96 and 520.27 is: 717.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.77 : 1,174.96 = 520.27 : x
  2. Step 2: Convert to fraction form
    851.77/1,174.96 = 520.27/x
  3. Step 3: Cross multiply
    851.77x = 1,174.96 × 520.27
  4. Step 4: Simplify right side
    851.77x = 611,296.44
  5. Step 5: Solve for x
    x = 611,296.44/851.77
  6. Step 6: Final answer
    x = 717.68

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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.