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Finding the Fourth Proportional to 681.65, 940.59 and 382.89

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Solution

The fourth proportional to 681.65, 940.59 and 382.89 is: 528.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.65 : 940.59 = 382.89 : x
  2. Step 2: Convert to fraction form
    681.65/940.59 = 382.89/x
  3. Step 3: Cross multiply
    681.65x = 940.59 × 382.89
  4. Step 4: Simplify right side
    681.65x = 360,142.51
  5. Step 5: Solve for x
    x = 360,142.51/681.65
  6. Step 6: Final answer
    x = 528.34

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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.