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Finding the Fourth Proportional to 302.50, 453.30 and 251.20

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Solution

The fourth proportional to 302.50, 453.30 and 251.20 is: 376.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.50 : 453.30 = 251.20 : x
  2. Step 2: Convert to fraction form
    302.50/453.30 = 251.20/x
  3. Step 3: Cross multiply
    302.50x = 453.30 × 251.20
  4. Step 4: Simplify right side
    302.50x = 113,868.96
  5. Step 5: Solve for x
    x = 113,868.96/302.50
  6. Step 6: Final answer
    x = 376.43

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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.