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Finding the Fourth Proportional to 1,968.20, 2,950.92 and 871.96

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Solution

The fourth proportional to 1,968.20, 2,950.92 and 871.96 is: 1,307.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,968.20 : 2,950.92 = 871.96 : x
  2. Step 2: Convert to fraction form
    1,968.20/2,950.92 = 871.96/x
  3. Step 3: Cross multiply
    1,968.20x = 2,950.92 × 871.96
  4. Step 4: Simplify right side
    1,968.20x = 2,573,084.20
  5. Step 5: Solve for x
    x = 2,573,084.20/1,968.20
  6. Step 6: Final answer
    x = 1,307.33

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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.