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Finding the Fourth Proportional to 474.26, 654.46 and 287.71

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Solution

The fourth proportional to 474.26, 654.46 and 287.71 is: 397.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.26 : 654.46 = 287.71 : x
  2. Step 2: Convert to fraction form
    474.26/654.46 = 287.71/x
  3. Step 3: Cross multiply
    474.26x = 654.46 × 287.71
  4. Step 4: Simplify right side
    474.26x = 188,292.33
  5. Step 5: Solve for x
    x = 188,292.33/474.26
  6. Step 6: Final answer
    x = 397.03

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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.