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Finding the Fourth Proportional to 286.02, 394.62 and 172.47

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Solution

The fourth proportional to 286.02, 394.62 and 172.47 is: 237.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.02 : 394.62 = 172.47 : x
  2. Step 2: Convert to fraction form
    286.02/394.62 = 172.47/x
  3. Step 3: Cross multiply
    286.02x = 394.62 × 172.47
  4. Step 4: Simplify right side
    286.02x = 68,060.11
  5. Step 5: Solve for x
    x = 68,060.11/286.02
  6. Step 6: Final answer
    x = 237.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.