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Finding the Fourth Proportional to 681.58, 940.65 and 382.84

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Solution

The fourth proportional to 681.58, 940.65 and 382.84 is: 528.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.58 : 940.65 = 382.84 : x
  2. Step 2: Convert to fraction form
    681.58/940.65 = 382.84/x
  3. Step 3: Cross multiply
    681.58x = 940.65 × 382.84
  4. Step 4: Simplify right side
    681.58x = 360,119.95
  5. Step 5: Solve for x
    x = 360,119.95/681.58
  6. Step 6: Final answer
    x = 528.36

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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.