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Finding the Fourth Proportional to 682.22, 941.47 and 387.49

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Solution

The fourth proportional to 682.22, 941.47 and 387.49 is: 534.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.22 : 941.47 = 387.49 : x
  2. Step 2: Convert to fraction form
    682.22/941.47 = 387.49/x
  3. Step 3: Cross multiply
    682.22x = 941.47 × 387.49
  4. Step 4: Simplify right side
    682.22x = 364,811.87
  5. Step 5: Solve for x
    x = 364,811.87/682.22
  6. Step 6: Final answer
    x = 534.74

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1.5x scale

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.