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Finding the Fourth Proportional to 540.98, 746.44 and 319.89

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Solution

The fourth proportional to 540.98, 746.44 and 319.89 is: 441.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.98 : 746.44 = 319.89 : x
  2. Step 2: Convert to fraction form
    540.98/746.44 = 319.89/x
  3. Step 3: Cross multiply
    540.98x = 746.44 × 319.89
  4. Step 4: Simplify right side
    540.98x = 238,778.69
  5. Step 5: Solve for x
    x = 238,778.69/540.98
  6. Step 6: Final answer
    x = 441.38

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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.