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Finding the Fourth Proportional to 372.70, 514.37 and 310.42

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Solution

The fourth proportional to 372.70, 514.37 and 310.42 is: 428.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.70 : 514.37 = 310.42 : x
  2. Step 2: Convert to fraction form
    372.70/514.37 = 310.42/x
  3. Step 3: Cross multiply
    372.70x = 514.37 × 310.42
  4. Step 4: Simplify right side
    372.70x = 159,672.15
  5. Step 5: Solve for x
    x = 159,672.15/372.70
  6. Step 6: Final answer
    x = 428.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.