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Finding the Fourth Proportional to 540.54, 745.86 and 319.46

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Solution

The fourth proportional to 540.54, 745.86 and 319.46 is: 440.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.54 : 745.86 = 319.46 : x
  2. Step 2: Convert to fraction form
    540.54/745.86 = 319.46/x
  3. Step 3: Cross multiply
    540.54x = 745.86 × 319.46
  4. Step 4: Simplify right side
    540.54x = 238,272.44
  5. Step 5: Solve for x
    x = 238,272.44/540.54
  6. Step 6: Final answer
    x = 440.80

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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.