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Finding the Fourth Proportional to 696.55, 959.29 and 681.43

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Solution

The fourth proportional to 696.55, 959.29 and 681.43 is: 938.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.55 : 959.29 = 681.43 : x
  2. Step 2: Convert to fraction form
    696.55/959.29 = 681.43/x
  3. Step 3: Cross multiply
    696.55x = 959.29 × 681.43
  4. Step 4: Simplify right side
    696.55x = 653,688.98
  5. Step 5: Solve for x
    x = 653,688.98/696.55
  6. Step 6: Final answer
    x = 938.47

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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.