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Finding the Fourth Proportional to 682.40, 941.70 and 371.90

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Solution

The fourth proportional to 682.40, 941.70 and 371.90 is: 513.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.40 : 941.70 = 371.90 : x
  2. Step 2: Convert to fraction form
    682.40/941.70 = 371.90/x
  3. Step 3: Cross multiply
    682.40x = 941.70 × 371.90
  4. Step 4: Simplify right side
    682.40x = 350,218.23
  5. Step 5: Solve for x
    x = 350,218.23/682.40
  6. Step 6: Final answer
    x = 513.22

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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.