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Finding the Fourth Proportional to 181.17, 269.90 and 172.28

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Solution

The fourth proportional to 181.17, 269.90 and 172.28 is: 256.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.17 : 269.90 = 172.28 : x
  2. Step 2: Convert to fraction form
    181.17/269.90 = 172.28/x
  3. Step 3: Cross multiply
    181.17x = 269.90 × 172.28
  4. Step 4: Simplify right side
    181.17x = 46,496.16
  5. Step 5: Solve for x
    x = 46,496.16/181.17
  6. Step 6: Final answer
    x = 256.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.