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Finding the Fourth Proportional to 1,241.50, 1,713.25 and 681.97

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Solution

The fourth proportional to 1,241.50, 1,713.25 and 681.97 is: 941.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.50 : 1,713.25 = 681.97 : x
  2. Step 2: Convert to fraction form
    1,241.50/1,713.25 = 681.97/x
  3. Step 3: Cross multiply
    1,241.50x = 1,713.25 × 681.97
  4. Step 4: Simplify right side
    1,241.50x = 1,168,384.88
  5. Step 5: Solve for x
    x = 1,168,384.88/1,241.50
  6. Step 6: Final answer
    x = 941.11

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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.