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Finding the Fourth Proportional to 681.32, 940.20 and 370.82

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Solution

The fourth proportional to 681.32, 940.20 and 370.82 is: 511.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.32 : 940.20 = 370.82 : x
  2. Step 2: Convert to fraction form
    681.32/940.20 = 370.82/x
  3. Step 3: Cross multiply
    681.32x = 940.20 × 370.82
  4. Step 4: Simplify right side
    681.32x = 348,644.96
  5. Step 5: Solve for x
    x = 348,644.96/681.32
  6. Step 6: Final answer
    x = 511.72

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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.