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Finding the Fourth Proportional to 286.67, 429.60 and 248.60

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Solution

The fourth proportional to 286.67, 429.60 and 248.60 is: 372.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.67 : 429.60 = 248.60 : x
  2. Step 2: Convert to fraction form
    286.67/429.60 = 248.60/x
  3. Step 3: Cross multiply
    286.67x = 429.60 × 248.60
  4. Step 4: Simplify right side
    286.67x = 106,798.56
  5. Step 5: Solve for x
    x = 106,798.56/286.67
  6. Step 6: Final answer
    x = 372.55

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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.