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Finding the Fourth Proportional to 681.19, 939.98 and 382.46

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Solution

The fourth proportional to 681.19, 939.98 and 382.46 is: 527.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.19 : 939.98 = 382.46 : x
  2. Step 2: Convert to fraction form
    681.19/939.98 = 382.46/x
  3. Step 3: Cross multiply
    681.19x = 939.98 × 382.46
  4. Step 4: Simplify right side
    681.19x = 359,501.01
  5. Step 5: Solve for x
    x = 359,501.01/681.19
  6. Step 6: Final answer
    x = 527.76

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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.