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Finding the Fourth Proportional to 497.28, 745.47 and 172.42

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Solution

The fourth proportional to 497.28, 745.47 and 172.42 is: 258.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.28 : 745.47 = 172.42 : x
  2. Step 2: Convert to fraction form
    497.28/745.47 = 172.42/x
  3. Step 3: Cross multiply
    497.28x = 745.47 × 172.42
  4. Step 4: Simplify right side
    497.28x = 128,533.94
  5. Step 5: Solve for x
    x = 128,533.94/497.28
  6. Step 6: Final answer
    x = 258.47

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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.