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Finding the Fourth Proportional to 302.45, 452.45 and 251.20

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Solution

The fourth proportional to 302.45, 452.45 and 251.20 is: 375.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.45 : 452.45 = 251.20 : x
  2. Step 2: Convert to fraction form
    302.45/452.45 = 251.20/x
  3. Step 3: Cross multiply
    302.45x = 452.45 × 251.20
  4. Step 4: Simplify right side
    302.45x = 113,654.94
  5. Step 5: Solve for x
    x = 113,654.94/302.45
  6. Step 6: Final answer
    x = 375.78

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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.