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Finding the Fourth Proportional to 682.29, 941.63 and 420.30

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Solution

The fourth proportional to 682.29, 941.63 and 420.30 is: 580.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.29 : 941.63 = 420.30 : x
  2. Step 2: Convert to fraction form
    682.29/941.63 = 420.30/x
  3. Step 3: Cross multiply
    682.29x = 941.63 × 420.30
  4. Step 4: Simplify right side
    682.29x = 395,767.09
  5. Step 5: Solve for x
    x = 395,767.09/682.29
  6. Step 6: Final answer
    x = 580.06

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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.