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Finding the Fourth Proportional to 540.56, 745.85 and 319.50

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Solution

The fourth proportional to 540.56, 745.85 and 319.50 is: 440.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.56 : 745.85 = 319.50 : x
  2. Step 2: Convert to fraction form
    540.56/745.85 = 319.50/x
  3. Step 3: Cross multiply
    540.56x = 745.85 × 319.50
  4. Step 4: Simplify right side
    540.56x = 238,297.48
  5. Step 5: Solve for x
    x = 238,297.48/540.56
  6. Step 6: Final answer
    x = 440.84

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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.