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Finding the Fourth Proportional to 496.72, 745.08 and 172.32

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Solution

The fourth proportional to 496.72, 745.08 and 172.32 is: 258.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.72 : 745.08 = 172.32 : x
  2. Step 2: Convert to fraction form
    496.72/745.08 = 172.32/x
  3. Step 3: Cross multiply
    496.72x = 745.08 × 172.32
  4. Step 4: Simplify right side
    496.72x = 128,392.19
  5. Step 5: Solve for x
    x = 128,392.19/496.72
  6. Step 6: Final answer
    x = 258.48

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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.