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Finding the Fourth Proportional to 286.41, 429.67 and 124.21

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Solution

The fourth proportional to 286.41, 429.67 and 124.21 is: 186.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.41 : 429.67 = 124.21 : x
  2. Step 2: Convert to fraction form
    286.41/429.67 = 124.21/x
  3. Step 3: Cross multiply
    286.41x = 429.67 × 124.21
  4. Step 4: Simplify right side
    286.41x = 53,369.31
  5. Step 5: Solve for x
    x = 53,369.31/286.41
  6. Step 6: Final answer
    x = 186.34

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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.