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Finding the Fourth Proportional to 502.50, 754.07 and 213.95

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Solution

The fourth proportional to 502.50, 754.07 and 213.95 is: 321.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.50 : 754.07 = 213.95 : x
  2. Step 2: Convert to fraction form
    502.50/754.07 = 213.95/x
  3. Step 3: Cross multiply
    502.50x = 754.07 × 213.95
  4. Step 4: Simplify right side
    502.50x = 161,328.44
  5. Step 5: Solve for x
    x = 161,328.44/502.50
  6. Step 6: Final answer
    x = 321.05

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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.