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Finding the Fourth Proportional to 539.89, 745.09 and 303.89

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Solution

The fourth proportional to 539.89, 745.09 and 303.89 is: 419.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.89 : 745.09 = 303.89 : x
  2. Step 2: Convert to fraction form
    539.89/745.09 = 303.89/x
  3. Step 3: Cross multiply
    539.89x = 745.09 × 303.89
  4. Step 4: Simplify right side
    539.89x = 226,425.40
  5. Step 5: Solve for x
    x = 226,425.40/539.89
  6. Step 6: Final answer
    x = 419.39

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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.