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Finding the Fourth Proportional to 682.42, 941.71 and 402.67

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Solution

The fourth proportional to 682.42, 941.71 and 402.67 is: 555.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.42 : 941.71 = 402.67 : x
  2. Step 2: Convert to fraction form
    682.42/941.71 = 402.67/x
  3. Step 3: Cross multiply
    682.42x = 941.71 × 402.67
  4. Step 4: Simplify right side
    682.42x = 379,197.69
  5. Step 5: Solve for x
    x = 379,197.69/682.42
  6. Step 6: Final answer
    x = 555.66

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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.