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Finding the Fourth Proportional to 1,782.91, 2,672.92 and 743.69

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Solution

The fourth proportional to 1,782.91, 2,672.92 and 743.69 is: 1,114.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,782.91 : 2,672.92 = 743.69 : x
  2. Step 2: Convert to fraction form
    1,782.91/2,672.92 = 743.69/x
  3. Step 3: Cross multiply
    1,782.91x = 2,672.92 × 743.69
  4. Step 4: Simplify right side
    1,782.91x = 1,987,806.79
  5. Step 5: Solve for x
    x = 1,987,806.79/1,782.91
  6. Step 6: Final answer
    x = 1,114.93

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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.