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Finding the Fourth Proportional to 681.99, 941.05 and 387.25

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Solution

The fourth proportional to 681.99, 941.05 and 387.25 is: 534.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.99 : 941.05 = 387.25 : x
  2. Step 2: Convert to fraction form
    681.99/941.05 = 387.25/x
  3. Step 3: Cross multiply
    681.99x = 941.05 × 387.25
  4. Step 4: Simplify right side
    681.99x = 364,419.74
  5. Step 5: Solve for x
    x = 364,419.74/681.99
  6. Step 6: Final answer
    x = 534.35

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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.