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Finding the Fourth Proportional to 540.12, 745.56 and 319.26

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Solution

The fourth proportional to 540.12, 745.56 and 319.26 is: 440.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.12 : 745.56 = 319.26 : x
  2. Step 2: Convert to fraction form
    540.12/745.56 = 319.26/x
  3. Step 3: Cross multiply
    540.12x = 745.56 × 319.26
  4. Step 4: Simplify right side
    540.12x = 238,027.49
  5. Step 5: Solve for x
    x = 238,027.49/540.12
  6. Step 6: Final answer
    x = 440.69

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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.