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Finding the Fourth Proportional to 681.68, 940.44 and 474.80

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Solution

The fourth proportional to 681.68, 940.44 and 474.80 is: 655.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.68 : 940.44 = 474.80 : x
  2. Step 2: Convert to fraction form
    681.68/940.44 = 474.80/x
  3. Step 3: Cross multiply
    681.68x = 940.44 × 474.80
  4. Step 4: Simplify right side
    681.68x = 446,520.91
  5. Step 5: Solve for x
    x = 446,520.91/681.68
  6. Step 6: Final answer
    x = 655.03

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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.