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Finding the Fourth Proportional to 852.48, 1,176.43 and 520.85

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Solution

The fourth proportional to 852.48, 1,176.43 and 520.85 is: 718.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.48 : 1,176.43 = 520.85 : x
  2. Step 2: Convert to fraction form
    852.48/1,176.43 = 520.85/x
  3. Step 3: Cross multiply
    852.48x = 1,176.43 × 520.85
  4. Step 4: Simplify right side
    852.48x = 612,745.20
  5. Step 5: Solve for x
    x = 612,745.20/852.48
  6. Step 6: Final answer
    x = 718.78

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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.