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Finding the Fourth Proportional to 681.95, 941.15 and 387.29

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Solution

The fourth proportional to 681.95, 941.15 and 387.29 is: 534.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.95 : 941.15 = 387.29 : x
  2. Step 2: Convert to fraction form
    681.95/941.15 = 387.29/x
  3. Step 3: Cross multiply
    681.95x = 941.15 × 387.29
  4. Step 4: Simplify right side
    681.95x = 364,496.05
  5. Step 5: Solve for x
    x = 364,496.05/681.95
  6. Step 6: Final answer
    x = 534.49

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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.