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Finding the Fourth Proportional to 540.40, 745.87 and 353.92

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Solution

The fourth proportional to 540.40, 745.87 and 353.92 is: 488.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.40 : 745.87 = 353.92 : x
  2. Step 2: Convert to fraction form
    540.40/745.87 = 353.92/x
  3. Step 3: Cross multiply
    540.40x = 745.87 × 353.92
  4. Step 4: Simplify right side
    540.40x = 263,978.31
  5. Step 5: Solve for x
    x = 263,978.31/540.40
  6. Step 6: Final answer
    x = 488.49

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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.