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Finding the Fourth Proportional to 682.36, 941.30 and 398.52

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Solution

The fourth proportional to 682.36, 941.30 and 398.52 is: 549.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.36 : 941.30 = 398.52 : x
  2. Step 2: Convert to fraction form
    682.36/941.30 = 398.52/x
  3. Step 3: Cross multiply
    682.36x = 941.30 × 398.52
  4. Step 4: Simplify right side
    682.36x = 375,126.88
  5. Step 5: Solve for x
    x = 375,126.88/682.36
  6. Step 6: Final answer
    x = 549.75

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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.