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Finding the Third Proportional to 371 and 438.50

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Solution

The third proportional to 371 and 438.50 is: 518.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    371 : 438.50 = 438.50 : x
  2. Step 2: Convert to fraction form
    371/438.50 = 438.50/x
  3. Step 3: Cross multiply
    371x = 438.50 × 438.50
  4. Step 4: Simplify right side
    371x = 192,282.25
  5. Step 5: Solve for x
    x = 192,282.25/371
  6. Step 6: Final answer
    x = 518.28

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.