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Finding the Fourth Proportional to 286.47, 395.09 and 193.20

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Solution

The fourth proportional to 286.47, 395.09 and 193.20 is: 266.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.47 : 395.09 = 193.20 : x
  2. Step 2: Convert to fraction form
    286.47/395.09 = 193.20/x
  3. Step 3: Cross multiply
    286.47x = 395.09 × 193.20
  4. Step 4: Simplify right side
    286.47x = 76,330.42
  5. Step 5: Solve for x
    x = 76,330.42/286.47
  6. Step 6: Final answer
    x = 266.45

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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.