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Finding the Fourth Proportional to 682.68, 941.71 and 420.51

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Solution

The fourth proportional to 682.68, 941.71 and 420.51 is: 580.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.68 : 941.71 = 420.51 : x
  2. Step 2: Convert to fraction form
    682.68/941.71 = 420.51/x
  3. Step 3: Cross multiply
    682.68x = 941.71 × 420.51
  4. Step 4: Simplify right side
    682.68x = 395,998.47
  5. Step 5: Solve for x
    x = 395,998.47/682.68
  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.