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Finding the Fourth Proportional to 681.99, 941.39 and 402.39

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Solution

The fourth proportional to 681.99, 941.39 and 402.39 is: 555.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.99 : 941.39 = 402.39 : x
  2. Step 2: Convert to fraction form
    681.99/941.39 = 402.39/x
  3. Step 3: Cross multiply
    681.99x = 941.39 × 402.39
  4. Step 4: Simplify right side
    681.99x = 378,803.91
  5. Step 5: Solve for x
    x = 378,803.91/681.99
  6. Step 6: Final answer
    x = 555.44

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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.