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Finding the Fourth Proportional to 550.75, 758.94 and 393.11

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Solution

The fourth proportional to 550.75, 758.94 and 393.11 is: 541.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.75 : 758.94 = 393.11 : x
  2. Step 2: Convert to fraction form
    550.75/758.94 = 393.11/x
  3. Step 3: Cross multiply
    550.75x = 758.94 × 393.11
  4. Step 4: Simplify right side
    550.75x = 298,346.90
  5. Step 5: Solve for x
    x = 298,346.90/550.75
  6. Step 6: Final answer
    x = 541.71

Related Problems

Find fourth proportional to 275.38, 379.47 and 196.56
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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.