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Finding the Fourth Proportional to 539.78, 745.18 and 382.54

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Solution

The fourth proportional to 539.78, 745.18 and 382.54 is: 528.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.78 : 745.18 = 382.54 : x
  2. Step 2: Convert to fraction form
    539.78/745.18 = 382.54/x
  3. Step 3: Cross multiply
    539.78x = 745.18 × 382.54
  4. Step 4: Simplify right side
    539.78x = 285,061.16
  5. Step 5: Solve for x
    x = 285,061.16/539.78
  6. Step 6: Final answer
    x = 528.11

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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.