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Finding the Fourth Proportional to 1,927.72, 2,891.52 and 629.14

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Solution

The fourth proportional to 1,927.72, 2,891.52 and 629.14 is: 943.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,927.72 : 2,891.52 = 629.14 : x
  2. Step 2: Convert to fraction form
    1,927.72/2,891.52 = 629.14/x
  3. Step 3: Cross multiply
    1,927.72x = 2,891.52 × 629.14
  4. Step 4: Simplify right side
    1,927.72x = 1,819,170.89
  5. Step 5: Solve for x
    x = 1,819,170.89/1,927.72
  6. Step 6: Final answer
    x = 943.69

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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.