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Finding the Fourth Proportional to 682.35, 941.55 and 387.55

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Solution

The fourth proportional to 682.35, 941.55 and 387.55 is: 534.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.35 : 941.55 = 387.55 : x
  2. Step 2: Convert to fraction form
    682.35/941.55 = 387.55/x
  3. Step 3: Cross multiply
    682.35x = 941.55 × 387.55
  4. Step 4: Simplify right side
    682.35x = 364,897.70
  5. Step 5: Solve for x
    x = 364,897.70/682.35
  6. Step 6: Final answer
    x = 534.77

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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.