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Finding the Fourth Proportional to 540.82, 745.71 and 393.52

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Solution

The fourth proportional to 540.82, 745.71 and 393.52 is: 542.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.82 : 745.71 = 393.52 : x
  2. Step 2: Convert to fraction form
    540.82/745.71 = 393.52/x
  3. Step 3: Cross multiply
    540.82x = 745.71 × 393.52
  4. Step 4: Simplify right side
    540.82x = 293,451.80
  5. Step 5: Solve for x
    x = 293,451.80/540.82
  6. Step 6: Final answer
    x = 542.61

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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.