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Finding the Fourth Proportional to 742.22, 1,110.92 and 395.06

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Solution

The fourth proportional to 742.22, 1,110.92 and 395.06 is: 591.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.22 : 1,110.92 = 395.06 : x
  2. Step 2: Convert to fraction form
    742.22/1,110.92 = 395.06/x
  3. Step 3: Cross multiply
    742.22x = 1,110.92 × 395.06
  4. Step 4: Simplify right side
    742.22x = 438,880.06
  5. Step 5: Solve for x
    x = 438,880.06/742.22
  6. Step 6: Final answer
    x = 591.31

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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.