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Finding the Fourth Proportional to 3,180.26, 4,770.46 and 871.76

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Solution

The fourth proportional to 3,180.26, 4,770.46 and 871.76 is: 1,307.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180.26 : 4,770.46 = 871.76 : x
  2. Step 2: Convert to fraction form
    3,180.26/4,770.46 = 871.76/x
  3. Step 3: Cross multiply
    3,180.26x = 4,770.46 × 871.76
  4. Step 4: Simplify right side
    3,180.26x = 4,158,696.21
  5. Step 5: Solve for x
    x = 4,158,696.21/3,180.26
  6. Step 6: Final answer
    x = 1,307.66

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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.