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Finding the Fourth Proportional to 497.46, 745.58 and 172.64

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Solution

The fourth proportional to 497.46, 745.58 and 172.64 is: 258.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.46 : 745.58 = 172.64 : x
  2. Step 2: Convert to fraction form
    497.46/745.58 = 172.64/x
  3. Step 3: Cross multiply
    497.46x = 745.58 × 172.64
  4. Step 4: Simplify right side
    497.46x = 128,716.93
  5. Step 5: Solve for x
    x = 128,716.93/497.46
  6. Step 6: Final answer
    x = 258.75

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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.