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Finding the Fourth Proportional to 741.30, 1,105.19 and 722.36

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Solution

The fourth proportional to 741.30, 1,105.19 and 722.36 is: 1,076.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.30 : 1,105.19 = 722.36 : x
  2. Step 2: Convert to fraction form
    741.30/1,105.19 = 722.36/x
  3. Step 3: Cross multiply
    741.30x = 1,105.19 × 722.36
  4. Step 4: Simplify right side
    741.30x = 798,344.20
  5. Step 5: Solve for x
    x = 798,344.20/741.30
  6. Step 6: Final answer
    x = 1,076.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.