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Finding the Fourth Proportional to 496.98, 745.54 and 172.38

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Solution

The fourth proportional to 496.98, 745.54 and 172.38 is: 258.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.98 : 745.54 = 172.38 : x
  2. Step 2: Convert to fraction form
    496.98/745.54 = 172.38/x
  3. Step 3: Cross multiply
    496.98x = 745.54 × 172.38
  4. Step 4: Simplify right side
    496.98x = 128,516.19
  5. Step 5: Solve for x
    x = 128,516.19/496.98
  6. Step 6: Final answer
    x = 258.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.