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Finding the Fourth Proportional to 1,782.41, 2,674.11 and 742.90

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Solution

The fourth proportional to 1,782.41, 2,674.11 and 742.90 is: 1,114.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,782.41 : 2,674.11 = 742.90 : x
  2. Step 2: Convert to fraction form
    1,782.41/2,674.11 = 742.90/x
  3. Step 3: Cross multiply
    1,782.41x = 2,674.11 × 742.90
  4. Step 4: Simplify right side
    1,782.41x = 1,986,596.32
  5. Step 5: Solve for x
    x = 1,986,596.32/1,782.41
  6. Step 6: Final answer
    x = 1,114.56

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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.