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Finding the Fourth Proportional to 372.21, 514.02 and 309.41

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Solution

The fourth proportional to 372.21, 514.02 and 309.41 is: 427.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.21 : 514.02 = 309.41 : x
  2. Step 2: Convert to fraction form
    372.21/514.02 = 309.41/x
  3. Step 3: Cross multiply
    372.21x = 514.02 × 309.41
  4. Step 4: Simplify right side
    372.21x = 159,046.34
  5. Step 5: Solve for x
    x = 159,046.34/372.21
  6. Step 6: Final answer
    x = 427.31

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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.