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Finding the Fourth Proportional to 844.79, 1,266.12 and 742.28

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Solution

The fourth proportional to 844.79, 1,266.12 and 742.28 is: 1,112.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.79 : 1,266.12 = 742.28 : x
  2. Step 2: Convert to fraction form
    844.79/1,266.12 = 742.28/x
  3. Step 3: Cross multiply
    844.79x = 1,266.12 × 742.28
  4. Step 4: Simplify right side
    844.79x = 939,809.22
  5. Step 5: Solve for x
    x = 939,809.22/844.79
  6. Step 6: Final answer
    x = 1,112.48

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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.