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Finding the Fourth Proportional to 497.16, 745.68 and 172.44

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Solution

The fourth proportional to 497.16, 745.68 and 172.44 is: 258.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.16 : 745.68 = 172.44 : x
  2. Step 2: Convert to fraction form
    497.16/745.68 = 172.44/x
  3. Step 3: Cross multiply
    497.16x = 745.68 × 172.44
  4. Step 4: Simplify right side
    497.16x = 128,585.06
  5. Step 5: Solve for x
    x = 128,585.06/497.16
  6. Step 6: Final answer
    x = 258.64

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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.