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Finding the Fourth Proportional to 682.22, 941.36 and 387.45

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Solution

The fourth proportional to 682.22, 941.36 and 387.45 is: 534.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.22 : 941.36 = 387.45 : x
  2. Step 2: Convert to fraction form
    682.22/941.36 = 387.45/x
  3. Step 3: Cross multiply
    682.22x = 941.36 × 387.45
  4. Step 4: Simplify right side
    682.22x = 364,727.99
  5. Step 5: Solve for x
    x = 364,727.99/682.22
  6. Step 6: Final answer
    x = 534.62

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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.