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Finding the Fourth Proportional to 286.36, 429.40 and 112.98

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Solution

The fourth proportional to 286.36, 429.40 and 112.98 is: 169.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.36 : 429.40 = 112.98 : x
  2. Step 2: Convert to fraction form
    286.36/429.40 = 112.98/x
  3. Step 3: Cross multiply
    286.36x = 429.40 × 112.98
  4. Step 4: Simplify right side
    286.36x = 48,513.61
  5. Step 5: Solve for x
    x = 48,513.61/286.36
  6. Step 6: Final answer
    x = 169.41

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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.