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Finding the Fourth Proportional to 681.28, 940.21 and 432.52

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Solution

The fourth proportional to 681.28, 940.21 and 432.52 is: 596.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.28 : 940.21 = 432.52 : x
  2. Step 2: Convert to fraction form
    681.28/940.21 = 432.52/x
  3. Step 3: Cross multiply
    681.28x = 940.21 × 432.52
  4. Step 4: Simplify right side
    681.28x = 406,656.20
  5. Step 5: Solve for x
    x = 406,656.20/681.28
  6. Step 6: Final answer
    x = 596.90

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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.