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Finding the Fourth Proportional to 552.22, 761.91 and 355.69

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Solution

The fourth proportional to 552.22, 761.91 and 355.69 is: 490.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.22 : 761.91 = 355.69 : x
  2. Step 2: Convert to fraction form
    552.22/761.91 = 355.69/x
  3. Step 3: Cross multiply
    552.22x = 761.91 × 355.69
  4. Step 4: Simplify right side
    552.22x = 271,003.39
  5. Step 5: Solve for x
    x = 271,003.39/552.22
  6. Step 6: Final answer
    x = 490.75

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.