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Finding the Fourth Proportional to 1,782.47, 2,674.41 and 742.22

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Solution

The fourth proportional to 1,782.47, 2,674.41 and 742.22 is: 1,113.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,782.47 : 2,674.41 = 742.22 : x
  2. Step 2: Convert to fraction form
    1,782.47/2,674.41 = 742.22/x
  3. Step 3: Cross multiply
    1,782.47x = 2,674.41 × 742.22
  4. Step 4: Simplify right side
    1,782.47x = 1,984,987.22
  5. Step 5: Solve for x
    x = 1,984,987.22/1,782.47
  6. Step 6: Final answer
    x = 1,113.62

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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.