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Finding the Fourth Proportional to 682.11, 941.27 and 402.45

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Solution

The fourth proportional to 682.11, 941.27 and 402.45 is: 555.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.11 : 941.27 = 402.45 : x
  2. Step 2: Convert to fraction form
    682.11/941.27 = 402.45/x
  3. Step 3: Cross multiply
    682.11x = 941.27 × 402.45
  4. Step 4: Simplify right side
    682.11x = 378,812.10
  5. Step 5: Solve for x
    x = 378,812.10/682.11
  6. Step 6: Final answer
    x = 555.35

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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.